178 ENGYSTOMATID^. 



18. HEMISUS*. 



Hemisus, G'dnth. Cut. p. 47 ; Cope, Nat. Hist. Rev. 18U5, p. 100, and 



Journ. Ac. Philad. (2) vi. 1867, p. 199. 

 KakopLi-ynus, Steindaehn. Sits. Ak. Wien, xlviii. 1863, p. 191. 



Pupil erect. Tongue subtriangular, broader in front. A cuta- 

 neous ridge across the palate, between the choanse, and another in 

 front of the oesophagus. No tympanum. Fingers free : toes free 

 or slightly webbed at the base, the tips not dilated. Outer meta- 

 tarsals united. Coracoids and precoracoids subequal in bulk ; pre- 

 coracoids horizontal, coracoids very obliquely directed backwards, 

 latter connected with former by the simple epicoracoid cartilage ; 

 omostcrnum cartilaginous ; sternum rudimentary. Diapophyses of 

 sacral vertebra slightly dilated. Terminal phalanges simple. 



Africa. 



1. Hemisus guttatum. 



Hemisus guttatum, part., Gibdh. Cat. pp. 47 & 137. 

 Engvstoma guttatum, Rap2), Arch. f. Naturfj. 1842, p. 290, pi. 6. 

 f. 3 & 4 ; Smith, III. S. Afr., Rept., App. p. 27. 



Sternal apparatus. 



Habit stout. Head small ; snout rather pointed, prominent, cunei- 

 form ; mouth small; lower jaw with three prominences in front; 

 eye small ; intcrorbital space broad. Fore limb short, clumsy, 

 adapted for burrowing ; fingers very short, pointed, first and second 

 equal, fourth shorter. Hind limb short, the tarso-mctatarsal arti- 

 culation marking the eye ; toes short, pointed, free, without subar- 

 ticular tubercles ; a small inner metatarsal tubercle. Skin smooth ; 

 a fold across the head, behind the eyes. Brown above, with round 

 whitish spots. Male with a subgular vocal sac. 



S. Africa. 



a. 6 ■ Natal. Sir A. Smith [P.]. 



2. Hemisus sudanense. 



Hemisus guttatum, part., Giinth. Cat. pp. 47 & 137. 

 ? Engystoma marmoratum, Peters, Arch.f. Katury. 1855, p. 58. 



* Hemisus obsatrtis, G-raudid. Ann. Sc. Nat. (5)xT.a. 20, p. 11. — Madagascar. 



