458 riPiDJ<:. 



Differs from X. Icevis in the longer tentacle below the eye (this 

 tentacle measuring about the diameter of the eye), and the presence 

 of a sharp claw at the base of the first toe. Hind limb longer, the 

 tarso-metatarsal articulation marking the tip of the snout ( $ ) or 

 beyond. Size smaller. 



Tropical Africa. 



a-c. 2 & hgr. Zanzibar. Sir J. Kirk [C.]. 



d. 2 ■ Benguella. Prof. Barboza du Bocage [P.]. 



c-f. Hgr. W. Africa. Mr. Fraser [C.]. 



g. Hgr. W. Africa. 



3. Xenopus calcaratus. 



Dactylethra miilleri, Sallow. Proc. Ac. Nat. Sc. Philad. 1857, p. 05 ; 



A.' Bum. Arch. Mtts. x. p. 231, pi. 18. f. 5. 

 Silurana tropicalis, Gray, Ann. fy Mag. N. H. xiv. 1864, p. 315, and 



Proc. Zooh Soc. 1864, p. 458. 

 Xenopus miilleri, Steindachn. Novara, Amph. p. 4. 

 calcaratus, Buchh, ty Peters, Mon. Perl. Ac. 1875 ; p. 200. 



Well distinguished from the two preceding by the smaller head 

 and extremely minute eyes. A much developed metatarsal claw. 

 Subocular tentacle short. Tarso-metatarsal articulation marking 

 the eye, or not quite so far. Size small. 



West Africa. 



a-&. S 2 • ? Stevens. 



e-h. Larvae. Lagos. T. Moore, Esq. [P.] (Types 



of Silurana tropicalis.) 



14. PIPID^. 



Astrodactylidse, Hogg, Classif. Amph., Mag. N. H. (n. s.) iii. 1839 



(name only). 

 Pipidse, Gilnth. Cat. ; Cope, Nat. Hist. Rev. 1865 ; Mivart, Proc. 



Zool. Soc. 1869. 



Teeth none. 



1. PIPA. 



Pipa, Law. Syn. JRept. p. 25; Men: Tent. p. 179; Cuv. Regne 



Anim. ; Dutn. 8f Bibr. viii. p. 767 ; G'dnth. Cat. p. 2. 

 Asterodactylus, Wagl. Syst. Amph. p. 199 ; Tsckudi, Bat?: p. 89. 

 Leptopus, sp., Mayer, Anal. p. 34. 



Pupil round. Palate smooth. No tympanum. Fingers free, 

 ending in four appendages ; toes very broadly webbed, pointed. 

 Outer metatarsals separated. Female with pouches in the back. 

 Coracoids and precoracoids strongly divergent, former much dilated, 

 connected by a broad double, not overlapping, cartilage; omo- 

 sternum rudimentary ; sternum a large cartilaginous plate. Diapo- 

 physes of sacral vertebra very strongly dilated. Terminal phalanges 

 pointed. 



Tropical America. 



