26 PROCEEDINGS OF THE ACADEMY OP [1883. 



the McCloud River, and by two specimens from Ashland at the 

 northern base of the Siskiyou Mountains, Oregon. 



This species belongs to the Rana temporaria group, and must 

 oe compared with Bana temporaria aurora B. and G., and B. 

 preliosa B, and G. The vomerine teeth are opposite the posterior 

 border of the choanee, and form two short, transverse series. 

 The toes are webbed to the base of the terminal phalange of the 

 fourth digit. The hind-leg extended reaches the extremity of 

 the muzzle with the heel. There are two plantar tubercles. The 

 internal is narrow, rather prominent and with obtuse extremit}' ; 

 the other is at the base of the fourth metatarsal bone, and is 

 rounded. 



The muzzle is obtuse and the head rather wide. Its greatest 

 width at the position of the membranum tympani, equals the 

 length from the end of the muzzle to the line connecting the 

 axillfe in some specimens ; in others to that connecting tlie middle 

 of the humeri. The skin is on all the superior surfaces thick and 

 glandular. This condition is especially marked in the dorso- 

 lateral fold of each side, which is so thickened in front as to 

 resemble a parotoid gland. This becomes less visible in alcohol. 

 The tympanic membrane is either entirely concealed, or is repre- 

 sented by a depression only. The skin covering it is roughened. 

 A groove extends downwards and backwards from it. Between 

 this and the canthus oris is a glandular thickening, and behind it 

 are two others, one above the other. Posterior to these on the 

 sides is a succession of rounded, roughened warts, similar to those 

 of the toads. Similar warts, but less prominent, are scattered 

 over the dorsal region, and are numerous near the extremity 

 of the coccyx. The skin of the superior surfaces of the head, 

 body and limbs is minutely but very distinctly roughened b}^ small 

 warts, each of whicli gives exit to a pore. Inferior surfaces smooth. 

 Length of fingers beginning with the shortest, 2 • 1 * 4 • 3. 



The color is dai-lv brown or nearly black, with indistinct darker 

 spots on the back; sides brown. Axilla and groin yellow, marbled 

 with black. Thighs above light or dark brown, with three darker 

 crossbars. Tibise similar, with three crossbars. Thighs behind, 

 black, coarsely vermiculated with yellow, or yellow closely spotted 

 with black. Below light yellow, spotted with brown on the gular 

 region and on front of femora. 



