456 DACTYLETHRID^. 



Suborder II. AGLOSSA. 



Aglossa, Phaneroglossa, part., Wagler, Syst. Ampli. 

 Plirynaglosses, Dum. q Bibr. Erp. Gen. viii. 

 Aglossa haplosiphona, Giinth. Cat. Batr. Sal. 

 Aglossa, Cope, Nat. Hist. Rev. 1865. 



Aglossa, Odontaglossa, Cope, Check-list N.-Amer. Batr. 8f Rept., 

 Bull. U.S. Nat. Mus. i. 1877. 



Eustachian tubes united into a single ostium pharyngium. No 

 tongue. 



The few members of this suborder have the vertebras opistho- 

 ceelian and deprived of ribs ; tbe diapophyses of the third and fourth 

 vertebras are extremely elongate, and those of the sacral are strongly 

 dilated and confluent -with the coccyx. 



In Pijia there are only seven presacral vertebras. 



The fronto-parietals are entirely ossified, and there are true ossa 



The sternal apparatus belongs to the arciferous type, though the 

 epicoracoid cartilages do not overlap. 



The larvae are provided with two spiracula, one on each side of 

 the body. 



13. DACTYLETHRIRffi. 



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

 (name only); Giinth. Cat.; Cope, Nat. Hist. Rev. 1865; Mivart, 

 Proc. Zool. Soe. 1869. 



Upper jaw toothed. 



1. XENOPUS. 



Xenopus, Wagl. Isis, 1827, p. 726, and Syst. Amph. p. 199. 

 Dactylethra, Cuv. Regne Anim. ; Tschudi, Batr. p. 55 ; Dum. 8f 



Bibr. viii. p. 762; Giinth. Cat. p. 1. 

 Silurana, Gray, Ann. $ May. N. H. 1864, xiv. p. 215. 



Pupil round. Palate smooth. No tympanum. Eingers free ; 

 toes broadly webbed, the first three provided with a sharply-pointed 

 nail. Outer metatarsals separated. Coracoids and precoracoids sub- 

 equal, strongly divergent, connected by a double, not overlapping, 

 cartilage ; no omosternum ; sternum a cartilaginous plate. Diapo- 

 physes of sacral vertebra very strongly dilated. Terminal phalanges 

 pointed. 



Tropical Africa. 



1. Xenopus laevis. 



Dactylethra laevis, Giinth. Cat. p. 2. 

 Bufo laevis, Baud. Rain. p. 85, pi. 30. f. 1, and Rept. viii. p. 171. 

 Pipa laevis, Men: Tent. p. 180. 



bufonia, Merr. I. c. 



Leptopus oxydactylus, Mayer, Anal. p. 34. 



