458 pipiDJs. 



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 ( 5 ) or 

 beyond. Size smaller. 



Tropical Africa. 



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



d. 5 • Benguella. Prof. Barboza du Bocage [P.]. 



e-f. Hgi-. W. Africa. Mr. Fraser [C.]. 



ff- Hgr. W. Africa. 



8. Xenopus calcaratns. 



Dactylethra miiUeri, Halhw. Proc. Ac. Nat. So. Philad. 1857, p. 65; 



A. Dum. Arch. Mm. x. p. 231, pi. 18. f. 5. 

 Silurana tropicalis, Oray, Ann. ^ Mag. N. S. xiv. 1864, p. 316, and 



Proc. Zool. Soc. 1864, p. 458. 

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

 calcaratus, Buchh. Sr Peters, Mon. B&rl. Ac. 1875, p. SOO. 



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~d. (S 5 . ? Stevens. 



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



of Silurana tropicalis.) 



14. PIPIDiB. 



Astrodactylidse, Sogg, Classif. Amph., Mag. iV. H. (n. s.) iii. 1839 



(name only). 

 Pipidee, Giinth. Cat. ; Cope, Nat. Hist. Rev. 1865 ; Mivart, Proc. 



Zool. Soc. 1869. 



Teeth none. 



1. PIPA. 



Pipa, Laur. Syn. Sept. 5. 25; Merr. Tent. p. 179; Cim. Bkgne 



Anim. ; Dum. Sf Bzbr. viii. p. 767 ; Oiinth. Cat. p. 2. 

 Asterodactylus, Wagl. Syst. Amph. p. 190 ; Tschiidt, Batr. p. 89. 

 Leptopus, sp., Mayer, Anal. p. 84. 



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. 



