410 lUJLLKTIX 31, UNITED STATES NATIONAL ML'.^EIJM, 



to tliosu faiiiiliiii' witli tho subjiHit. It is not iinpossiMe that oiu' or tlu' 

 oflicrof tlio siibspocics may come to bo rocogiiizefl as species, but I 

 scarct'ly aiitlci[tato that such will be the case. As a whole, the linna 

 arcithtin is jirctty well distiuj-uislied by its very sliort palmation. N(!ver- 

 tlicii'ss, I liave sei'u'a speclnu'U IVom (luatemala witli simihir po>toiior 

 feet, which is otiierwise not (liU'erent iVom tlie R. rit'eHvem. 



liana arcotata arcolata lid. »Sj (lird. 



liaita aiivlain l?ainl & Ciiranl, I'rocfod. Ac. Pliila., K)'i, \>. 17:?; Bairil, U. S. Mtix. 

 Hoiui.l. Suiv., I'l. ;!(!, li^M. 11,12. 



Fig. 103. Rana arenlata arealata. Xo. 3304. Imlinnnlu. Tot. ; \ 



Gciu'ral shape slomler and limbs elon^jated. Tiie lieel of the extended 

 hind l('fj reaclu's lialf-way between orbit and nostril. Head about as 

 broad as lon.i,s (pnte deep. Sides ol)Ii(iue, with the- nostrils, as viewed 

 from the sideof head ol)li(iue, a little below the upper prolile or canthus 

 rostralis, and with a inarfjinal papilla. A .^lij^lit excavation between nos- 

 tril and eye, continued under the latter, alonj; upper I'df^eof maxillary, to 

 the t,vm|>anum, but si^arcely helow it. Top of the head slij;htly j;rooved, 

 or concave longitudinally. I'^yes large and .prominent ; in the middle 

 third of the side of the head; nostril midway between it and tip of 

 snout. Tympanum cir(!ular, not two thirds of the diaiiu'ter of the eye, 

 not extending back to angU; of jaw, but nean'r this than to (',\e, nearly 

 smooth centrally. Upper maxillary large; no glandular ridge of skin 

 on it. Very well-developed vocal vesicles on each side, their center.s 

 opposite th<' posterior end of mandible. 



Internal nostrils very large, oi)en, transversely elongate, with a very 

 shallow groove extending to the side of the Jaw. The vomerine teeth 

 are well developed, on two oblique protuberances, nearly in contact be- 

 hind, and placed between the nostrils, the |)osterior edges of which are 

 about opposite the anterior canthus of the eye. The tongue is large, 

 fleshy, longer than broad, with the coruua small and wide apart. Tho 

 Eustachian apertures are nu)derate. 



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