196 ON THE FAMILIES OF THE RANIFORM ANURA. 



I have only been able to examine the livers of Phrynidium 1 se ve and P. v a r i u m ;. 

 as the A. flavescens is very similar in type, its structure is probably identical 

 with the former. 



«. Etlimoid plate ossified to extremity of muzzle. 

 A. flavescens Dum. Bibr. 1. c. Caj-enne. 



PHRYNIDIUM Martens. 

 Nomenclator Kept. Mus. Berolin, 1853. Phirix Schmidt, Denkschr. Wien, 1858, 

 256. 



As proposed by its namer, this genus was not distinguishable from Phryniscus, 

 with which it is accordingly united in Giinther's Catalogue. The structure of the 

 liver I find to be different, and though I here regard the distribution as generic, I 

 suspect it to have a higlier value, and to be of a more radical character than the pecu- 

 liar atrophy of the auditory apparatus. 



aa. Ethmoid plate cartilaginous anteriorly (in Iseve and va ri u m). 

 P. Iseve Atehpus m.m Nat. Hist. Review, Lond. 1865; Phrynucus Icevi-s, Gthr. 



Catal. 43. Tab. Panama to Chili. 

 P. c r u c i g e r u m Martens, Gthr. 1. c. "Phirix pachydermiis Schmidt," Gthr. Cen- 

 tral America. 

 P. variuiu Stanuius {Atelopm), Martens Nomencl. Reptil. Mus. Berol. Central 



America. 

 P. bibroni Schmidt, Denkschr. Acad. Wiss. Wien, 1858, 256. Tab. Puerto 



Cabello. 

 ?P. olfersii Martens, Nomenclator, 1. c. Gthr. 1. c. Brazil. '* 



RHINODERMA Dum. Bibr. 



Erp. Gen. viii. 657. 

 R. d a r w i n i i D. B. 1. c. Bell, Voy. Beagle. Chili. 



It is to be observed that the R. s i g n i f e rum of Girard* belongs to the family 

 Bufonidge, having the cranial structure of Bufo and Paludicola. It must be referred 

 to the latter genus, the supposed dermal lobe of the muzzle being entirely rudimeutal, 

 and of uncertain character. 



PHRYNISCUS Weigmann. 



Nova Acta, Ac. Leop. 1834, 264. Dum. Bibron, Gunther. Chaunus s^. Tschudi. 

 Hylcemorphua Fitzinger. 



P. nigricans Wiegm., Dum. Bibr., Gthr., Cope, Pr. A. N. Sci. 1862, 353 (var.) 

 Buenos Ayres. 



* Proceed. Academy, 1853, 424. 



