EAST AFRICAN TORTOISES. 933 



OlIELONE. 



Chelonia, part., Brongn. liull. Soc. Philom. ii. p. 89 (1800). 

 Chelone Blgr. Cat. Ohel. p. 180 (1889). 



Two species. 



Synoj)sis of the Species. 



Carapace unicarinate in young. Limbs usually with a single claw ... mt/daSi 

 Carapace tricarinate in young. Limbs usually witli a double claw ... imbricata. 



1. Chelone mydas (Linn.). Green Turtle. 

 Blgr. L c. p. 186. 



Tanganyika Territory, Kenya Colony. 



2. Chelone imbricata (Linn.). Hawksbill Turtle. 

 Blgr. t. c. p. 183. 



Tanganyika Territory, Kenya Colony. 



TuALASSOCIIELYa. 



Fitz. Ann. Wien. Mus. i. p. 121 (1835); Blgr. Cat. Chel. p. 184 

 (1889). 



One species. 



1. TuALASsoouBLVs CARETTA (Linn.). Loggerhead Turtle. 

 Tanganyika Territoiy, Kenya Colony. 



Trionychid^. 

 One genus. (Ct/cloderma in neighbouring territories.) 



Trionyx. 



Trionyx, part., GeofFr. Ann. Mus. xiv. p. 1 (1809); Blgr. Oat. 

 Ohel. p. 242 (1889). 



1. Trionyx triunguis (Forskal). Freshwater Soft-Tortoise. 



Victoria Nyanza. 



EXPLANATION OF THE PLATES. 



Plate I. 



Type of T. procterce, sp. n., from a water-colour drawing made after death. 



Plath II. 

 Tyiw of T, procterw, sp. n., dorsal and ventral views from X-rny photographs. 



Proc. ^ool. Soc— 1923, No. LXI. 61 



