446 BULLETIN 34, UNITED STATES NATIONAL MUSEUxM. 



aud Girard. The vomerine teeth are ojiposite the posterior border of 

 tlie choanse, aud form two short, oblique series, directed iuwards and 

 backwards. The toes are webbed to the termiual 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 nar- 

 row, rather prominent, and with obtuse extremity ; the other is at the 

 base of the fourth metatarsal bone, and is rounded. 



The muzzle is. obtuse aud 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 axilli© in some specimens: 

 in others to that connecting the middle of the humeri. The skin is on 

 all the superior surfaces thick and glandular. This condition is espe- 

 cially marked in the dorsolateral fold of each side, which is so thickened 

 in front as to resemble a paratoid gland. This becomes less visible in 

 alcohol. The tympanic membrane is either entirely concealed or is rep- 

 resented by a depression only. The skin covering it is roughened. A 

 groove extends downwards and backwards from it. Between this and 

 the canthus ovis 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 on the toads. Similar warts, 

 but less prominent, are scattered over the dorsal region, and are numer- 

 ous near the extremity of the coccyx. The skin of the superior surfaces 

 of the head, body, and limbs is minutely but very distinctly roughened 

 by small warts, each of which gives exit to a pore. Inferior surfaces 

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



The color is dark 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 cross-bars. Tibise 

 similar, with three cross-bars. Thighs, behind, black, coarsely vermicu- 

 lated with yellow, or yellow closely spotted with black; below, light 

 yellow, spotted with brown on the gular region and on front of femora- 



The specimens from Ashland agree with those from the McCloud, ex- 

 cept that they are nearly black above aud do not exhibit the dorsal 

 spots. 



I compare this species with the Uana draytoni, from the Eussian River, 

 near the coast of California. That species has but one palmar tubercle, 

 the internal, which is of similar proportions to that of the B. hoylii. 

 The skin is not thickened, and is much less glaudular everywhere. The 

 membranum tympani is entirely distinct. The posterior face of the femur 

 is not vermiculated with yellow, but is covered with large black masses. 

 The whole of the under surfaces are brown-spotted. There are four 

 brown cross bars on the tibia; traces of the fourth sometimes appear in 

 the R. hoylii. From Rana pretiosa it differs in all these characters, 

 besides those that belong to the latter; i. e., the fasciculated vomerine 

 teeth and the short hind legs. 



