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THE BATRACIIIA OF XORTII AMHKICA. 



293 



lyiiipaiiK.'. JiUlgcs of Ccinthus coiiciivc, piirullcl on t-iitl of muzzle; latter 

 truiieate in [)rorile. Strong- niaxilliiry ridge tVoni inferior niargin of 

 orbit to posterior extremity of the bone. Loreal region coneave, nos- 

 trils subvertical; tympanum balf orbit. Two strong convergent parie- 

 tal ridges from supraorbital, eacli longer than supratympanic of its 

 side. Length of head from end muzzle to posterior border tympanum 

 e(|uals breadth l)elo\v at eanthus oris in specimens 1.5 inches long; rel- 

 itiively less in larger specimens, till in one .'5.7.1 inches long it is scarcely 

 oser two thirds the breadth. Eyelids nearly horizontal ; tongue ordi- 

 uary obpyriform; choana'- larger than ostia pharyngca. Length of 

 head, as above, three to three and a <piarter times from end of muzzle to 

 end of urostyle. Parotoid glands n)easured longitudinally equal supra- 

 orbital ridge, longer obliquely ; acuminate posteriorly and continuous 

 with a lateral series of acute tubercles (sometimes on a jdica), which ex- 

 lend downwards to groin. Skin above with scattered rounded, on sides 

 with close acuminate, tubercles; below with c!.'»se small rounded tu- 

 bercdes. 



Second .linger short— iless than fourth; a keeled palmar and elongate 

 pollicary tubercle; palms aiul soles rough with tubercles. A small 

 acuminate and insignilic^nit extcrn-il metatarsal tubercle. No inner tar- 

 sal fold. Toes half webbed and margined. The carpus of the extended 

 arm reaches beyond the muzzle; the heel attains fiom the hinder to 

 the front margin of the orbit. 



Dimensions of an adult (San Antonio) : From end muzzle to end 

 urostyle, .) inches 9 lines; from same to jiosterior nuiigin tymi)anuin 

 (obli<pu'), 2 inches LM lines; anteiior extremity, 1 inch 1.5 lines to carpus 

 + .S lines to end longest linger, femur, 1 inch lines; tibia, 1 inch 3 

 lines; foot from heel, 2 inches; tarsus, 10 lines. 



Coloration: Above a chestnut brown, with a dark cross-band be- 

 tween orbits. A dark lateral band from behind orbit along the side to 

 groin, Ibilowing below the lateral fold, which is light-bordered above; 

 a more or less distinct liglit vertebral line; ui)per lip yellow-bordered, 

 r.reast and gular regions more or less slate shaded. Limbs brown, 

 cross-barred. 



Varieties: Of these I am acquainted with three, which are quite < is- 

 tiiigulshable. First. The tyi>ical has a strong parietal ridge, is scarcely 

 varied with darker below, and is light brown above ; sides very tuber- 

 culous; specimens from Texas, Tanuiulii»as, and Vera Cruz — Emory 

 andSartoriiis. Second. Sides with smaller granulations; colors black- 

 ish, spotting and varying the whole inferior regions. Three specimens 

 from Y^icatan (Nos. 721), 778, 771))— Schott. Third. Ridges weaker, 

 especially the parietal; cinnamon-brown, below brown varied and 

 spotted ; sides giauular. Two specimens from Belize — Dr. Parsous. 



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