456 DACTYLETHRIDX. 
Suborder II. AGLOSSA. 
Aglossa, Phaneroglossa, part., Wagler, Syst. Amph. 
Phrynaglosses, Dum. § Bibr. Erp. Gén. viii. 
Aglossa haplosiphona, Giinth. Cat. Batr. Sal. 
Aglossa, Cope, Nat. Hist. Rev. 1865. 
Aglossa, Odontaglossa, Cope, Check-list N.-Amer, Batr. § Rept., 
Bull. OS. Nat. Mus. i. 1877. 
Eustachian tubes united into a single ostium pharyngium. No 
tongue. 
The few members of this suborder have the vertebra opistho- 
ccelian and deprived of ribs ; the diapophyses of the third and fourth 
vertebrx are extremely elongate, and those of the sacral are strongly 
dilated and confluent with the coccyx. 
In Pipa there are only seven presacral vertebra. 
The fronto-parietals are entirely ossified, and there are true ossa 
nasalia, 
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. DACTYLETHRIDZ. 
Dactylethride, Hogg, Classif. Amph., Mag. N. H. (n. 8.) ii. 1839 
(name only); Giinth. Cat.; Cope, Nat. Hist. Rev. 1865; Mivart, 
Proc. Zool. Soc. 1869, 
Upper jaw toothed. 
1. XENOPUS. 
Xenopus, Wagl. Isis, 1827, p. 726, and Syst. Amph. p. 199. 
Dactylethra, Cuv. Régne Anim.; Tschudi, Batr. p. 55; Dum. & 
Bibr. viii. p. 762; Giinth. Cat. p. 1. 
Silurana, Gray, Ann. § May. N. H. 1864, xiv. p. 215. 
Pupil round. Palate smooth. No tympanum. Fingers 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 levis. 
Dactylethra levis, Giinth. Cat. p. 2. 
Bufo levis, Daud. Rain. p. 85, pl. 30. f. 1, and Rept. viii. p. 171. 
Pipa levis, Merr. Tent. p. 180. 
bufonia, Merz. l. c. 
Leptopus oxydactylus, Mayer, Anal. p, 34. 
