B ATB A CHI A AXOUR A. 17 



In revising the genera established by various authors,* we have 

 concluded to adopt Leptodactylus, Cystiynatltus, Pleurodema, and Crinia, 

 and to institute several others under the appellation of Ranidella, 

 Wayleria, and Kassina, two of which (Crinia and Kassina], had no 

 representatives in the collection made by the Exploring Expedition. 



But, as Crinia is intimately related to Ranidella, it will be expected 

 that we should recall the characters by which we propose to distin- 

 guish it as a genus. They are the following : 



CRIXIA, Tsch. Vomerine teeth few, constituting two groups, situated 

 at the posterior margin of the inner nostrils. Tongue entire ; ob- 

 long in shape. Tympanum inconspicuous. Eustachian tubes small. 

 Fingers and toes not palmated. 



SYN. Crinia, TSCH. in Mem. Soc. Sc. nat. Neuch. II, 1838, 78. GRD. in Proc. 

 Acad. Nat. Sci. Philad. VI, 1853, 420. 



So far but one species of this genus has come to our knowledge, 

 Crinia yeoryiana, Tsch., a native of Australia. 



GENCS RANA, LINN. 



GEX. CHAR. Teeth on the upper jaw. Vomerine teeth situated 

 between the inner nostrils. Tongue broad, oblong, narrowest an- 

 teriorly, bifurcated posteriorly, and free upon the posterior third of 

 its length. Tympanum distinct. Openings of Eustachian tubes 

 varying in size, according to the species. Fingers and toes subcir- 

 cular; the fingers always free; the toes more or less palmated. 

 Processus of the first cuneiform bone, obtuse. Transverse apophy- 

 sis of the sacral vertebra not dilated into pallets. Two internal or 

 external vocal bladders or sacs in the males. 



SYN. Rana, LINN. Syst. Nat, ed. VI*, 1748. DUM & B. Erp. gen. VIII 1841 

 335. 



OBSERV. This genus, as here characterized, is restricted within 

 narrower limits than in the " Erpetologie ge"nerale." 



* Proc. Acad. Nat. Sei. Philad. VI, 1853, 420. 



