And Partial Skeleton

174 BULLETIN FLORIDA STATE MUSEUM Vol. 18, No. 3

Testudo cautleyi Lydekker 1889a, p. 86. Testudo cauthley Riabinin 1915, p. 12 (typographical error). TYPE.-British Museum (Natural History); an epiplastron. TYPE LOCALITY AND HORIZON.-Siwalik Hills, near Nila, Potwar, Punjab, India; Upper Siwalik beds, Potwar Silts, Middle Pleistocene? GEOLOGIC RANGE.-Middle Pleistocene. GEOGRAPHIC RANGE.-Punjab, India. REMARKs.-Geochelone (?Megalochelys) cautleyi is smaller than G. atlas and generally believed not the same species on the basis of the available epiplastron. The differences are conceivably sexually corre- lated.

Geochelone (Megalochelys) Igadowi (Van Denburgh)

Testudo guentheri Gadow 1894, p. 320 (invalid name, not of Baur 1889, proposed for T. sumeirei; Sauzier [part]). Testudo gadowi Van Denburgh 1914, p. 257. TYPE.-Museum of Zoology, Cambridge University; anterior part of plastron. TYPE LOCALITY AND HoRIzoN.-Mare aux Songes, Mauritius Island, Mascarene Group, Indian Ocean; Late Pleistocene or Early Recent. GEOLOGIC RANGE.-Pleistocene and/or Recent. GEOGRAPHIC RANGE.-Mauritius Island.

Subgenus fMonachelys Williams

Monachelys Williams 1952, p. 547 (as subgenus). TYPE SPECIES.-Testudo (Monachelys) monensis Williams (=Geo- chelone [Monachelys] monensis [Williams]). DEFINITION.-A Nearctic subdivision of the genus Geochelone in which the majority of the characters are as in the subgenus Chelonoidis, except that the centrum of the first dorsal vertebra is very elongate and the xiphiplastral notch is absent. GEOLOGIC RANGE.-Known only from the Late (?) Pleistocene. GEOGRAPHIC RANGE.-Mona Island, West Indies. REMARKS.-The relationships of this monotypic subgenus are not clear, but it is believed to be close to Chelonoidis.

Geochelone (Monachelys) fmonensis (Williams)

Testudo (Monachelys) monensis Williams 1952, p. 547, pls. 44-47. TYPE.-American Museum of Natural History; skull, parts of shell, and partial skeleton.