152 CRUSTACEA: BRANCHIOPODA-OSTRACODA Phylum ARTHROPODA Sub-Phylum CRUSTACEA Class BRANCHIOPODA Order DIPLOSTRACA Sub-Order CLADOCERA Family Polyphemidae EVADNE NORDMANNI Lovén [Apstein, 1901, p. 12] 1892, appeared beginning of July, still present in Oct. (E.J.B.): 1895, constantly present in Aug.; disappeared early Oct. (T.V.H.): April-May, 1899 (P.T.C.): May, July, Sept. 1903; March-June 1904 (L.H.G.): 1916, began in the end of April and grew very common in May; was common through the summer until the middle of Sept. when it disappeared; 1917-28, might be common any time between March and Oct., very abundant July 1919, 1928, June 1925; inside and outside Sound and Station E.1 (M.V.L.): Hamoaze No. 12 Buoy, in plankton, 20.7.28 (E.P.) Breeding: Aug. (T.V.H.): winter eggs produced about mid-Sept. (E.J.B.) PODON INTERMEDIUS Lilljeborg [Apstein, 1901, p. 14] 1892, became less abundant in July and disappeared about mid-Sept. (E.J.B.): 1895, constantly present in Aug., disappeared early in Oct. (T.V.H.): Plymouth neighbourhood, April-Sept. 1903; April-July 1904 (L.H.G.): very similar in occurrence to Evadne, but is more frequent in Aug. and Sept. 1916, April-Aug. 1917-18; present March-Oct. 1920-8; very abundant Aug. 1922, July 1928; inside and outside Sound, Station E.1 (M.V.L.): River Tamar as far as Black Buoy opposite River Tavy, in plankton; River Lynher, 100 yds. above Antony Creek, Aug.-Sept. 1928 (E.P.): carrying ova, Aug. (T.V.H.) PODON LEUCKARTI Sars [Apstein, 1901, p. 13] Plymouth neighbourhood, April 1905, rare (L.H.G.) Class OSTRACODA Order MYODOCOPA Family Cypridinidae PHILOMEDES INTERPUNCTA (Baird) [Brady and Norman, 1896, II, p. 656] Sound and near Eddystone (A.M.N.*): in mud, Mewstone or Rame, June 1938 (Elofson, 1940, p. 495) ASTEROPE MARIAE (Baird) [Sars, 1922, p. 17; Brady and Norman, 1896, II, p. 630] Plymouth (A.M.N.) * These records of Crustacea are taken from Norman and T. Scott, 1906 153 CRUSTACEA: OSTRACODA Order CLADOCOPA Family Polycopidae POLYCOPE ORBICULARIS G. O. Sars [Sars, 1922, p. 31; Brady and Norman, 1896, II, p. 706] Plymouth (A.M.N.) POLYCOPE AREOLATA Sars, 1923, p. 33 Mewstone mud, Plymouth (R.G.): June 1938 (Elofson, 1940, p. 495) POLYCOPSIS COMPRESSA (Brady and Robertson) [Sars, 1923, p. 37] Plymouth Sound (R.G.) Order PODOCOPA Family Cypridae PONTOCYPRIS TRIGONELLA G. O. Sars [Sars, 1923, p. 48; Brady and Norman, 1889, I, p. 109] Plymouth (A.M.N.): in mud, Mewstone or Rame, June 1938 (Elofson, 1940, p. 495) ERYTHROCYPRIS MYTILOIDES (Norman) [Sars, 1923, p. 50; Brady and Norman, 1889, I, p. 107, as Pontocypris] In mud, Mewstone or Rame, June 1938 (Elofson, 1940, p. 495) SALCOMBE. (A.M.N.) ANCHISTROCHELES ACEROSA (Brady) [Brady and Norman, 1889, I, p. 110] Off Eddystone, rare (G.S.B.) ARGILLOECIA CYLINDRICA G. O. Sars [Sars, 1923, p. 54; Brady and Norman, 1889, I, p. 111] Off Eddystone (G.S.B.) SALCOMBE (A.M.N.) BAIRDIA INFLATA (Norman) [Sars, 1923, p. 67; Brady and Norman, 1889, I, p. 112] Devonshire coast (Spence Bate's dredgings): Plymouth (A.M.N.): in mud, Mewstone or Rame, June 1938 (Elofson, 1940, p. 495) BAIRDIA ACANTHIGERA Brady [Brady and Norman, 1889, I, p. 113] Devonshire coast (Spence Bate's dredgings): Plymouth (A.M.N.) Family Cytheridae CYTHERIDEA ANGUSTATA (Münster) [Brady and Norman, 1889, I, p. 172, as C. elongata] Borough Island. SALCOMBE (A.M.N.) EUCYTHERE DECLIVIS (Norman) [Sars, 1925, p. 163; Brady and Norman, 1889, I, p. 178] Plymouth (A.M.N.) 154 CRUSTACEA: OSTRACODA CYTHERE LUTEA O. F. Müller [Sars, 1925, p. 167; Brady and Norman, 1889, I, p. 125] A common tide-mark species: Plymouth (A.M.N.) CYTHERE SEMIPUNCTATA Brady [Brady and Norman, 1889, I, p. 130] Near Eddystone (G.S.B. and D.R. fide A.M.N. and T.S.) CYTHERE ALBOMACULATA Baird [Sars, 1925, p. 169; Brady and Norman, 1889, I, p. 138] A common species between tide-marks all round the coast (A.M.N.) LEPTOCYTHERE PELLUCIDA (Baird) [Sars, 1925, p. 172; Brady and Norman, 1889, I, p. 127, as Cythere confusa] Plymouth (A.M.N.) LEPTOCYTHERE MACALLANA (Brady and Robertson) [Sars, 1925, p. 173; Brady and Norman, 1889, I, p. 128, as Cythere] SALCOMBE (A.M.N.) XENOCYTHERE CUNEIFORMIS (Brady) [Sars, 1925, p. 179] In mud, Mewstone or Rame, June 1938 (Elofson, 1940, p. 495) HEMICYTHERE VILLOSA (G. O. Sars) [Sars, 1925, p. 182; Brady and Norman, 1889, I, p. 146, as Cythere] Plymouth (A.M.N.): in mud, Mewstone or Rame, June 1938 (Elofson, 1940, p. 495) SALCOMBE (A.M.N.) HEMICYTHERE QUADRIDENTATA (Baird) [Sars, 1925, p. 186; Brady and Norman, 1889, I, p. 159; as Cythere] Plymouth (A.M.N.) HEMICYTHERE OBLONGA (Brady) [Sars, 1925, p. 190; Brady and Norman, 1889, I, p. 138, as Cythere] Plymouth (A.M.N.) CYTHEREIS MARGINATA (Norman) [Brady and Norman, 1889, I, p. 142, as Cythere] SALCOMBE (A.M.N.) CYTHEREIS FUDICULA (Brady and Robertson) [Brady and Norman, 1889, I, p. 143, as Cythere navicula] Plymouth (A.M.N.) SALCOMBE (A.M.N.) CYTHEREIS EMACIATA (Brady) [Elofson, 1940, p. 498] Plymouth (A.M.N.): near Eddystone (G.S.B. and D.R. fide A.M.N. and T.S.): in mud Mewstone or Rame, 1938 (Elofson, 1940, p. 495) CYTHEREIS RUNCINATA (Baird) [Elofson, 1940, p. 495] Plymouth Sound, 1889 (A.M.N.): in mud, Mewstone or Rame, 1938 (Elofson, 1940, p. 495) CYTHEREIS TUBERCULATA (G. O. Sars) [Brady and Norman, 1889, I, p. 161 as Cythere] Plymouth (A.M.N.) 155 CRUSTACEA: OSTRACODA CYTHEREIS FINMARCHICA (G. O. Sars) [Brady and Norman, 1889, I, p. 163, as Cythere] Near Eddystone (G.S.B. and D.R. fide A.M.N. and T.S.) CYTHEREIS ANTIQUATA (Baird) [Brady and Norman, 1889, I, p. 168, as Cythere] Plymouth (A.M.N.) near Eddystone (G.S.B. and D.R.): in mud, Mewstone, or Rame, 1938 (Elofson, 1940, p. 495) CYTHEREIS JONESI (Baird) [Sars, 1925, p. 196; Brady and Norman, 1889, I, p. 169] Off Eddystone (G.S.B. and D.R. fide A.M.N. and T.S.): in mud, Mewstone or Rame, 1938 (Elofson, 1940, p. 495) CYTHERURA CORNUTA Brady [Brady and Norman, 1889, I, p. 192] SALCOMBE (A.M.N.) CYTHERURA SELLA G. O. Sars [Sars, 1925, p. 204; Brady and Norman, 1889, I, p. 194] Plymouth (A.M.N.) SALCOMBE (A.M.N.) CYTHERURA ACUTICOSTATA G. O. Sars [Sars, 1926, p. 210; Brady and Norman, 1889, I, p. 195] Plymouth (A.M.N.) CYTHERURA STRIATA G. O. Sars [Sars, 1926, p. 208; Brady and Norman, 1889, I, p. 196] Plymouth (A.M.N.) SALCOMBE (A.M.N.) CYTHERURA ANGULATA Brady (Brady and Norman, 1889, I, p. 197] Plymouth (A.M.N.) SALCOMBE (A.M.N.) CYTHERURA PRODUCTA Brady [Sars, 1926, p. 209; Brady and Norman, 1889, I, p. 199] Off Eddystone (G.S.B. and D.R.) CYTHERURA NIGRESCENS (Baird) [Sars, 1925, p. 202; Brady and Norman, 1889, I, p. 200] Everywhere between tide-marks (A.M.N.) CYTHERURA CONCENTRICA Norman, Crosskey and Robertson [Brady and Norman, 1889, I, p. 201] SALCOMBE (A.M.N.) CYTHERURA FULVA Brady and Robertson [Sars, 1926, p. 214; Brady and Norman, 1889, I, p. 205] Off Eddystone (G.S.B. and D.R.) SALCOMBE (A.M.N.) CYTHERURA CELLULOSA (Norman) [Sars, 1926, p. 216; Brady and Norman, 1889, I, p. 206] SALCOMBE (A.M.N.) 156 CRUSTACEA: OSTRACODA LOXOCONCHA IMPRESSA (Baird) [Sars, 1926, p. 218; Brady and Norman, 1889, I, p. 183] In mud, Mewstone or Rame, 1938 (Elofson, 1940, p. 495) SALCOMBE (A.M.N.) LOXOCONCHA GUTTATA (Norman) [Elofson, 1940, p. 500] Plymouth (A.M.N.): in mud, Mewstone or Rame, 1938 (O.E.) LOXOCONCHA TAMARINDUS (T. R. Jones) [Sars, 1926, p. 221 ; Brady and Norman, 1889, I, p. 186] Off Eddystone (G.S.B. and D.R. fide A.M.N. and T.S.): in mud, Mewstone or Rame, 1938 (Elofson, 1940, p. 495) LOXOCONCHA MULTIFORA (Norman) [Brady and Norman, 1889, I, p. 185] Plymouth (A.M.N.): off Eddystone (G.S.B. and D.R.) CYTHEROPTERON NODOSUM Brady [Sars, 1926, p. 232; Brady and Norman, 1889, I, p. 208] Eddystone (G.S.B. and D.R.) SALCOMBE (A.M.N.) CYTHEROPTERON DEPRESSUM Brady and Norman [Brady and Norman, 1889, I, p. 218] Off Eddystone (G.S.B. and D.R.) SALCOMBE (A.M.N.) CYTHEROPTERON HUMILE Brady and Norman, 1889, I, p. 219 In the burrows of Limnoria and Chelura, Plymouth (H.G.C.) BYTHOCYTHERE CONSTRICTA G. O. Sars [Sars, 1926, p. 235; Brady and Norman, 1889, I, p. 220] Off Eddystone (G.S.B. and D.R.) SALCOMBE (A.M.N.) BYTHOCYTHERE TURGIDA G. O. Sars [Sars, 1926, p. 233; Brady and Norman, 1889, I, p. 221] Off Eddystone (G.S.B. and D.R.): in mud, Mewstone or Rame, 1938 (Elofson, 1940, p. 495) PSEUDOCYTHERE CAUDATA G. O. Sars [Sars, 1926, p. 239; Brady and Norman, 1889, I, p. 225] Off Eddystone (G.S.B. and D.R. fide A.M.N. and T.S.) XESTOLEBERIS AURANTIA (Baird) [Sars, 1928, p. 243; Brady and Norman, 1889, I, p. 188] Near Eddystone (G.S.B. and D.R.) SALCOMBE (A.M.N.) XESTOLEBERIS LABIATA Brady and Robertson [Brady and, Norman, 1889, I, p. 189] Plymouth (A.M.N.) SALCOMBE (A.M.N.) 157 CRUSTACEA: OSTRACODA XESTOLEBERIS DEPRESSA G. O. Sars [Sars, 1928, p. 244] In mud, Mewstone or Rame, 1938 (Elofson, 1940, p. 495) PARACYTHEROIS FLEXUOSA (Brady) [Sars, 1928, p. 250; Brady and Norman, 1889, I, p. 236, as Paradoxostoma] Plymouth (A.M.N.) SCLEROCHILUS CONTORTUS (Norman) [Sars, 1928, p.