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Les diagrammes suivants illustrent la mAthode. 1 7H4 ^RI)rint>d from Bulletin No. VI. of the Naiurnl Ilislory SooU-ty of New Drunswick.) MARINE ALG.E OF THE MARITIME rilOVINCES. O, U. HAY. I'll. n. Last year I published in the Bulletin a partial list of the marine algae of the Bay of Fundy, amounting to thirty-three species. During the season of 1880, through the kindness of Professor Macoun, Government Botanist, and Mr. Robert Chalmers, of the Geological Survey, I was permitted to accompany the latter gentleman on a canoe trip which he made in July last, along the coasts of Caraquet and Tracadie, and around the islands of Shippegan and Miscou. Later in the season I visited Grand Manan, examining the alga' of Dark Harbor, Southern Head and other points. On propos- ing to Mr. MacKay, of Pictou Academy, to make this list include the marine algic flora of the Maritime Provinces, that gentleman heartily resi)onded, and has sent me not only the result of his own observations, but a record of those plants collected on the Nova Scotia shore by Dr. Harvey and des- cribed in his " Nereis Boreali-Americana," together with some observations made by Dr. Jeans, of Prince Edward Island, and contributed to Dr. Harvey's work. To these may be added a short list i)ublished in 1879 by Professor Fowler, of Queen's University, in his addenda to the New Brunswick flora, and these are referred to in the subjoined list. A col- lection of marine alga? made by the late Professor 0. Fred. Hartt on the shores of the Bay of Fundy has just been placed in my hands, but too late to have the results of his investiga- tions incorporated. It is, no doubt, the earliest collection of New Brunswick algae. Both Mr. MacKay and myself have been too busy with regular work to give much more than a passing notice to this UiVJ'^S branch of our flora. Our aim has been to gather up the knowledge that has been attained of our marine forms of vegetation, and incorporate it in the form that follows, hoping tliat it will serve as a guide to the more careful study in future of these interesting plants. I desire to express my obligation to Mr. J. E. Humphrey and Dr. W. G. Farlow of Karvard University for their deter- mination of critical species. St. John, March, 1887. Introductory List of the Marine Alqje of the Mari- time Provin( Es, with Notes, by G. U. Hay, Ph. B., Saint John, and A. H, MAt Kay, B. A., B. Sc, F. S. Sc, Principal of Pictou Academy, N. S. OHDKIl I.—CKYPTOPHVCE,*:. 1. ChitlirocysUs roseo-persicina, Cohn. On mud in brackish pond, Pictou harlmur, MacKay, on decaying alffjf along sliore of Gulf of St. Lawrence, Haif. 2. O.scillaria subtorulosa, {Br§b). On floating balls of Poli/siphonia, in Pictou harbour, JfarKai/. !{. Lyngl»ya nmjuscula, Ilarv. Pictou harbour, MacKay. 4. L. lestuarii, Liebm. In brackish pond, Pictou harbour, MacKay. OKBER II.—ZOOSPORE.*:. T). Ulva lactuca. (Linn.) Lc Jolis, Pictou harbour, MacKay. (a). Var. rigida, (Ag.) Le Jolis, and (i). Var. actuca, Le Jolis, are common in tide pools along the southern coast of New Brunswick, Hay. (c). Var. latissima, Le Jolis, Richibucto River, Fowler. Common in brackish waters along the whole coast of New Brunswick, Hay. (5. U. euteromorpha, Le Jolis, also (a). Var. lanceolata, Le Jolis, and (A). Var. compres.sa, Le Jolis, Pictou harbour, MacKay; Frye's Island, St. John, Hay. (f). Var. intestinalis, Le Jolis. Very common, Richibucto River, Fowler; St. John, Hay. 7. U. clathrata, Ag. On Zontera marina, Pictou, AfacKai/; Miscou Island, Ifa>/. 8. U. Ilopkirkii, (McCalln) Ilarv. Pictou harlxiur, .VaiKai/. 9. Ulothrix ('ollalK.'ns, (Ag.)Tliur. ? Grand Manan, /An/. 10. Cha?toinorplia molajjoiiiuiii, (Web. & Molir.) Kutz. Halifax har- bour, Ma'-Knii. 11. C. Pic(iuotiana, (Mont.) Kutz. Halifax, JIarvctf in N.B.Am. 12. Khizooloniiini torluo.suni, Kutz. Halifax, Harvey in X. B.-Atn.; Sliippegan Island, T/d//. 13. Cladophora arcta, (Dillw). P. E. Island, Dr. Jeans; Halifax, Ilarvfji; Grand Manan and Frye's Island, Haii. 14. C. lanosa, (Holh) Kutz, V'ar. uncialis, Tliuret. P. E. Island, Jcam. Halifax, Jlarvei/. 15. ('. ruixjstris, (Linn.) Kutz. Sbippegan Island, I/ay. Hi. C. refracta (Hotb) Arcschoug. Frye's Island, JIai/. 17. C. glaucescens, (Griff.) Harv. Halifax, Ilari'ei/; North Miscou, 18. C. flexdosa. (Griff.) Harv. Miscou Island, Jfat/. 19. C. gracilis, (GrilT.) Kutz. Frye's Island, Jfay.