196 PELOMEDUSID^. 



longer than that between tlic fcmorals ; the length of the outer 

 border of the pectoral shield is much less than that of the humeral, 

 and docs not exceed the length of the inner border of the latter 

 sliicld. Head large ; snout very short ; upper jaw neither hooked 

 nor bicuspid ; the ■\\idth of the interorbital space at least equals the 

 longitudinal suture between the two frontal shields. Dark brown 

 or blackish, plastral shields usually yellowish in the middle ; head 

 brownish above, closely vermiculated with black ; upper lip with 

 blackish dots or vertical lines. 



Length of shell 27 centim. 



West Africa. 



«. $,stffd. Gambia.. Earl of Derby [P.]. (Type.) 



b. 2 ) shell. Sierra Leone. 



c, cl. Ilgr. & yg., stffd. Cape Verde. M. Boucard [C.]. 



e. Ilgr., spir. Angola. J. J. Monteiro, Esq. [P.]. 



f, if, fi- d 2, f^tffd. W. Africa. 

 V, k. S 2i shells. W. Africa. 

 /, Yg., spir. W. Africa. 

 m. Yg., spir. ? 



5, Sternothserus adansonii. 



Emys adansonii, >ScJiicei(/(/. Prodi: p. '•)[) (1814). 



Hydraspis adansonii, Oray, Syn. lle})t. p. 40 (IS.'il). 



Pentonyx adansonii, Bum. l^ Bihr. ii. p. 394 (183o). 



Pelomedusa ? adansonii, Gray, Cat, Tort. p. 38 (1844). 



Sternotha3rus adansonii, A. Bum. Cat. Meth. Jiepf. p. 19 (1851) ; 

 Oral/, Cat. Sh. liept. i. p. 52 (1855), and Proc. ZooJ. Soc. 1864, 

 p. 29(i, pi. xxiii., and Suppl. Cat. Sh. Itept. i. p. 80 (1870). 



Carapace keeled throughout life ; second and third vertebral 

 shields nearly as long as broad in the adult. Hind lobe of plastron 

 narrower than in the preceding species. Intergular shield not 

 twice as long as broad ; suture between the abdominal shields 

 shorter than that between the femorals ; the length of the outer 

 border of the pectoral shield equals or slightly exceeds that of the 

 humeral. Head large ; snout very short ; upper jaw neither hooked 

 nor l)icuspid ; the width of the interorbital space equals the longi- 

 tudiiuil suture between the two frontal shields. Shell yellowish or 

 pale brown above, with dark brown dots and radiating lines ; 

 uniform yellow inferiorly ; head brown above, elegantly vermiculated 

 with yellow ; lips and lower parts uniform yellowish. 



Length of shell 15 centim. 



Senegambia and Sudan. 



a, h, c. J , ? , & hgr., slffd. W. Africa. 



d-e, f. IJgv., spir. W. Africa. 



ff. ligr., shell. W.Africa. 



/'. Ilgr., spir. Upper Nile. Consul Petherick [C.]. 



