418 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



I 



u 



Ufa 



Hea 



Ilea 



Hea<' 



T 



tiirr 



81)0* 



18 a 



out I 



are 

 islioi 



8C'|)£ 



virei 



Loil; 



til)i£ 

 tlie 

 lowi 

 47!)4 



situated on tlio caiitlius rostralis. The hollow of tlii> face aiiteriitr (o 

 the eye is very shallow, and scarcely traceable under the eye juul tyia- 

 panuui. Eyes larg^i; contained three times in chord of ui^ier jaw aiitl 

 one diameter from the tip. Tympanum small (females only seen), about 

 three-fourth the size of the eye; behind not reaching the end of the 

 jaw. Patches of vomerine teeth very small, circular, approximated, 

 and situated on a level with the centers of the inner nares. These arc 

 large, oblong, and widely separated. Tongue rather small, narrow. 

 Eustachian ostia large. 



The skin is moderately smooth, but on very close examiiuition is seen 

 minutely and closely dotted all over with small pits, and among theso 

 on the under surfaces are scattered small glandiform elevations, whicli 

 on being emptied are represented by the pits. This is sometimes seen in 

 other species, but seldom so distinctly, and may be caused by some pe- 

 culiar and temporary condition of the skin. There appears to be a very 

 low and scarcely distinct dermal ridge from the eye along the sides, but 

 none intermediate. The granulation on the buttocks is very low ami 

 indistinct. 



The fore-arm is shorter than the hand ; the femur is not (piite half the 

 length of the bodj', aiul is about as long as the tibia. The hind feet are 

 unusually long, considerably exceeding the tibia. The feet are veiy 

 fully webbed, coming near li, catcsbiana in this respect, the web extend- 

 ing between the tips of the toes, slightly excavated in the inner e<lges 

 of the second and third. The terminal joint of longest toe appears to 

 be entirely free and the second is rather narrowly margined. 



In alcohol the color everywhere above and on sides (even over tyni- 

 pauum and on buttocks) is dark purplish-brown, coarsely and irregu- 

 larly siuuated with bluish-white, which, as far as Professor Daird's re- 

 collection of several years goes, is yellow during life. Beneath, silvery- 

 white on throat and chin; duller behind. The joints of the hind legs are 

 distinctly banded transversely with dark blotches with bluish-white mar- 

 gins, as on the back, and separated by lighter intervals. The sides are 

 darker than the rest of the body, and on the groin are seen a few light 

 spots rather than sinuations. 



The specimens described (all fenndes) were caught in Garrison's 

 Creek, near Sackett's Harbor, in the sununer of l.S5(K They were in a 

 marshy piece of ground, about a mile from the lake, and attracted im- 

 mediate attention by their peculiarities of color, so dillerenf from any 

 other American species : 



IllcllPB. 



Total length 2. '<;-) 1. 00 



Arm fiom elbow tlO .10 



Foinm- 1.10 .lit 



Tibia l.dj . ic, 



Tarsus r>(i . -i'l 



Hind foot 1.18 ..Vi 



The variations of the liatm scptcufrionaUs are greater than those of any 

 other North Anicvicau species of the genus. There i.s, however, no coin- 



Total 



Chord of lioiid . 

 Width of brad. 

 Ky(^ 



Inches. 

 .. 1.70 

 .. ,H0 

 . 7") 

 . . . ','7 



Tynipanuin iJO 



.7C 

 .35 

 .3.') 



.la 



.09 



