(598 MR. ST. GEORGE MIVART ON PLICTHODON PE RSI M I LIS. [Juiie 27, 



Fie. 2. Fis;. 1 . 



Fig. 4, Fig. .3. 



Fig. 1. Dorsum of right nianus of Pfcfoflhssa 2}e7:'<im///s. 



2. Dorsum of riglit. pes of rcrfngfusttii ■pcrsiiiiilis. 



{i. ])orsiim of right manus ol' I'Jcfhudon f/hitivoiiUK. 



4. Dorsum of right pes of Fh'fhodon glufhicsvx. 



Indeed I believe there may be more grounds for associating it with 

 the Japanese form Onychodactylus than with the last-mentioned 

 American species, an arrangement wliich would harmonize well with 

 the facts of geographical zoology. Nevertheless, as it has not nail- 

 like processes on the digits, nor yet a precloacal fold, both of which 

 exist in the last-mentioned genus, I think it better to jjlace it in a 

 genus by itself, for which I propose the name Pectoglossa *, retaining 

 of course the specific name chosen by Dr. Gray ; so that the species 

 will be named Pectoglossa persimilis. 



Fie. 6. 



v^ 



Fig. 5. Inside of mouth of Pectoglossa persimilis. 

 6. Inside of mouth of I'ldhodon ghtfinosus. 



In the fixed condition of the posterior part of the tongue Pecto- 

 glossa agrees with both Hynobius and Onychodactylus ; but the 

 transverse position of the palatine teeth causes it more to resemble 

 the latter genus. 



I am inclined to think that when the skull comes to be examined 

 it will be found that there are two distinct premaxillary bones. The 

 characters of the genus may perhaps be thus expressed : — 



Pectoglossa. 



Toes 4/5, first of each manus rather long, first of each pes not 

 very short ; digits with rounded ends and no simulation of nails ; 



* ITjjktos, •yXtucrcrn. 



