26 REPTILES. 



genus for it (as if it were a new and remarkable form), but likewise 

 have overlooked the characteristic figure of it in a work so well 

 known as the "Zoology of the Beagle." As for the vocal sac — 

 which is wanting altogether according to Hallowell's examination — 

 the internal subgular vocal sac is not only present, but the usual 

 openings on each side of the tongue are so large (even in a rather 

 small, of course male, individual) that a thick pencil may be introduced 

 into them. I have but little doubt that Spix has ali-eady given a 

 description of this animal, with a bad figure, as Rana scutata. 

 Wagler afterwards formed it into his genus Hemijihi-actus. 



14. HETEROGLOSSA. 



Head nearly as long as the body, and about as long as broad; 

 nine teeth in the lower jaw (?) ; no palatine teeth ; eustachian tubes 

 small ; tongue suboval, deeply notched behind, attached by a cylin- 

 di-ical pedicel at the centre, entirely free in its posterior half, bound 

 down anteriorly along the middle line by cellular tissue, reaching 

 from the tip to the pedicel, free laterally except at the apex ; fingers 

 free ; toes webbed at the base ; tympanum distinct {Hcdlowell). 

 Sacral vertebra ? 



Heteroglossa, Halloivell, Proc. Ac. Philad. 1857, p. C4. 



1. Heteroglossa africana. 

 Hallowell, I. c. 

 Chocolate-brown above ; abdomen ash-coloured. Gaboon. 



Fam. 2. CYSTIGNATHID^. 



Ranina with free toes, cylindrical processes of sacral vertebra, 

 and without paratoids. 



Synopsis of the Genera. 



1. Cystignathus. Vomerine teeth in two groups or in two oblique 



or curved series ; never a large gland. Tropical America ; 

 Africa (AustraKa). 



2. Pleurodema. A large gland on each loin. South America. 



3. Limnodynastes. Vomerine teeth in a straight line; no large 



gland on the loin. Australia. 



1. CYSTIGNATHUS. 



Extremities moderate ; fingei's quite free ; toes free, sometimes 

 very slightly webbed or fringed. Skin smooth, or with cutaneous or 



