418 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



situated on the cautLus rostralis. The hollow of the face anterior to 

 the eye is very shallow, and scarcely traceable under the eye and tym- 

 panum. Eyes largo; contained three times in chord of upper jaw and 

 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 are 

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

 Eustachian ostia large. 



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

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

 on the under surfaces are scattered small glandiform elevations, which 

 on being emptied are rei)resented 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 and 

 indistinct. 



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

 length of the body^ and is about as long as the tibia. The hind feet are 

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

 fully webbed, coming near B. cafeshiana in this respect, the web extend- 

 ing between the tips of the toes, slightly excavated in the inner edges 

 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 tym- 

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

 larly sinuated with bluish- white, which, as far as Professor Baird's re- 

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

 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 females) were caught in Garrison's 

 Creek, near Sackett's Harbor, in the summer of 1850. They were in a 

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

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

 other American species : 



Inches. Inches. 



Total leugth 2.25 1. 00 



Arm from elbow 90 .40 



Femur 1.10 .49 



Tibia 1,04 .46 



Tarsus , 56 .2,'} 



Hind foot 1.18 .52 



Total 1.70 .76 



Chord of head 80 .35 



Widthofbead 75 .35. 



Eye - 27 .12 



Tympanum 20 .09 



The variations of the Eana septentrionalis are greater than those of any 

 other North American species of the genus. There is,, however, no coin- 



