BATRACHIAANOURA. 79 



edge with a membranous fold, less developed, however, than in B- 

 boreas. The process at the base of the inner toe is very prominent 

 and subconical. The second or outermost is less elevated. 



The skin above, is provided with small glands or pustules, similar 

 in structure to the parotids, being perforated with small pores. These 

 glandulse, however, are smaller than in B. boreas ; the largest are 

 observed upon the hind limbs. In B. columbiemis, these small glands 

 are irregularly scattered all over the surface of the body. The inter- 

 mediate space is covered with small warts and granules. The upper 

 part of the fore limbs and hands, the inferior surface of the thighs, the 

 tarsus all around, and the feet above, are covered with a minute granu- 

 lation. Beneath, the skin is warty, the warts being more apparent 

 under the belly than under the legs, chest, and head. 



The ground color is light-greenish ; a dorsal, white vitta extends 

 from the occiput to the posterior extremity of the body. Large, 

 irregular patches of brownish-black are observed over the upper 

 region of the body and limbs, confluent on each side of the dorsal 

 vitta, and also upon the flanks, assuming the shape of transverse bars 

 on the legs, where they are larger than elsewhere. The papillae, the 

 parotids, the warts, the granules, and tubercles are reddish. The 

 upper surface of the head is yellowish-brown, and its sides green. 

 Tympanum blackish, with spots all around it. The margin of the jaws 

 is whitish. An oblique, elongated, black patch may be seen under 

 the anterior part of the eye, extending from the margin of the upper 

 jaw, obliquely upwards and forwards. A small black spot covers the 

 nostrils, and another may be observed under it, upon the middle of 

 the snout, whilst a third one is seen occupying the margin of the 

 upper jaw, between the latter two. The iris is reddish-orange. The 

 inferior surface is dull-yellowish or whitish, maculated with blackish 

 under the chest, sides of belly, and under the limbs. 



In very small and immature specimens many of the characters 

 ascribed to this species are already conspicuous. The web of the toes 

 appears to be still less developed than in B. boreas. 



Specimens were collected on Columbia River, Oregon. Drawn from 

 life. 



Plate V, fig. 4, represents B. columbiensis, size of life. 

 Fig. 5, is a side view of the head. 



C ' 



