932 MR. A. LOVERIDQE : NOTES OUT 



Synopsis of the Genera. 



Mesoplftstra extending right across the plastron; front lobo of 



plastron movable in thoadult Sternothairus. 



Mcsoiilastra small and lateral; front lobe of plastron without 



bingo in adult I'aloinodusa. 



Sternoth^rus. 



Sternothcerus , part., Bell, Zool. Jour. ii. p. 305 (1825); Blgr. 

 Cat. Chel. p. 191 (1889). 



Threo species. {S. sinuatus and S. nigricans doubtfully dis- 

 tinct and difficult of determination.) 



I. Beak notched mesially, with a very slight, obtuse cusp on each 

 side of the notch ; interorbital width considerably less than the 



longitudinal suture between the frontal shields sinuatus. 



II. Beak neither hooked nor bicuspid; frontal suture not or but 

 slightly exceeding the width of the interorbital space. 



A. The length of the outer border of the pectoral shields equals 



that of the humeral nigricans. 



B. The length of the outer border of the pectoral is much less 



than that of the humeral, and does not exceed the length of 



the inner border of the latter shield derhianus. 



1. STERNGTniERiJs siNUATUs"(Smitli). Smith's Water Tortoise. 

 Blgr. «.c.p..LU 



Tanganyika Territory, Kenya C)olony, Uganda. 



2. STERNOTn^RUS NIGRICANS (Donnd.). Black Water Tortoise. 

 Blgr. t.c. p. 195. 



Tanganyika Tenitory, Kenya Colony, Uganda. 



3. STERNOTHiERUS DERBiANUS (Gray).' Derby's Water Tortoise. 

 Blgr. t. c. p. 195. 



Uganda. 



Pelomedusa. 



Wagl. Syst. Amph. p. 136 (1830); Blgr. Cat. Chel. p. 197 

 (1889). 



One species. 



1, Pelomedusa galeata (Schoepff). 

 Blgr. t.c. p. 197. 

 Tanganyika Territory', Kenya Colony, Uganda. 



CnELONIDiE. 



Two genera. 



Synopsis of the Genera, 



Costal shields in four pairs Chelone, 



Costal shields in five or more pairs ThalassocheJi/s. 



