TlIK r.ATRAf'IlIA OF NOliTll AMKl.'ICA 



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tlie tail, or tli(!S(! tluTc is a piitcli of laif^er <)lu^s on the i>aiot<)i«l rcjiioii, 

 and aiiotiier on the top of the head inside of tlie orbits and extendirij;' 

 antei'ioily in a straijiht line towards thc^ nostrils and passing;' bactkwards 

 seMiiciniuhirly behind tlie e.ve. A doable row around the edjje of the 

 lower Jaw ; a jiaii' on ea(;h outer (postal space alonu' tlie side of the body, 

 and a row on each side of the top of the tail ; the latter indicated {jen- 

 erally by a whitish dot. 



Head broad ; depressed ; width nearly (Mpial to distance from snout to 

 K'nlar fold, and nearly one Ibuith the distance to insertion of hind le^s. 

 licn^th of mouth alonj^' axis of body half distance from snout to liular 

 fold, which is nearly continuous a<'ross the nape. There is a constiic'tion 

 behind the ar-yle of the Jaws, interrupted above and below, and a fur- 

 row eonnectinj;" the two alonji' the jjaiotoid re.i^ion and extended in a 

 lateral line to the oibit. Distance troni snout to jiular fold <'outained .'U 

 times in distance to insertion of hind legs (four tinu's in another speca- 

 nien). 



Theeyes are moderately laru'e; the longlh of the orbit contained t.l times 

 in distan(!e from snout to <iulai' fold; about once in distance from the nos- 

 trils, and about on(H' in the distance between the two nostrils : nearly 

 twi<!C in distance between the anterior extremities ol'the orbits. 



Uody nearly cyliudri(!al, perhaps slightly depressed, and swollen a 

 little in the middle; on each side are t'leveu costal <rro.)ves, iiuiludinc: in-, 

 guinal and axillary ones ; all strongly marked an<l nearly continuous 

 above and below; the axillary is, however, usually (juite inconspicuous; 

 four more of these furrows to behind the anus, wlnu'c the last is (ronlln- 

 ent with the tirst caudal furrow; these become less and less distin(;t to 

 near the middle of the tail. There is a slight groove down the middle 

 of the back. 



The tail is oval in se(!tion, the larger end of the oval below ; becMnn- 

 ing more and more comi»resscd to the tip, without indication of any 

 ridge. There is a lat«Mal indentation along the whole length. wlii(Oi is 

 about e.jual to the distan(!e from the base to the sn()ut. In alcoholic 

 specamens the tail is bent or curved, sometimes upwards, sometimes 

 down, sometimes lateially. 



The digits are nearly (cylindrical, or slightly depressed, without web 

 or nnirgin. Th(> third or longest linger is contaiiu'il al>out 2\ tinu's in 

 the distancic to the elbow. The second linger reaches to the last artic- 

 ulaticMi ; the fourth to the |)enultimate. 



The fourth toe is longest, (contained L*;\ times in the (listan(!e to the 

 knetc; the third, second, lifth, and first succ(vssively shorter. The dis- 

 tance between the outstretciu'd hind toes is rather more than L', the 

 length to behind anus. 



The tongue is thi(!k, lleshy, and attached, although free at the (^Iges 

 except behind; it is about two thirds the width of the upper jaw, tu'arly 

 orbicular, though the outline of the papillose i)oiliou is a little emar- 

 ginate behind. Italmost seems as if the tongue wei-e capalile of closing 

 round an obi(M;t in its c(>ntt>r. as in th(> hollow of the li;ind. 



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