444 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



some scattered warts on the sides; skiu otherwise entirely smooth. 

 Toes obtuse, with wide webs reaching to the base of the penultimate 

 phalange. One long metatarsal tubercle; one fold on the tarsus; a 

 dermal border on outer toe. The heel extends beyond the end of the 

 muzzle. 



Light brown above; below, yellow. Three rows of rather distant, 

 solid, small black spots between the dorsal folds; two or three rows on 

 each side; none of the spots yellow-bordered. Head unspotted; no 

 band on the lip. A brown vertical band on the front of the humerus. 

 Scattered spots on tibia and femur; clouded spots on the posterior 

 face of the femur. Size of Rana clamata. 



This frog, of which a female specimen was obtained, combines charac- 

 teristics of different groups; its coloration resembles somewhat that of 

 the eastern or typical form of Rana virescens, but the full palmation of 

 the hind foot is that of R. montezumce and R. catcsbiana. It is also quite 

 similar to the R. draytoni, which is the R. longi^pes of Hallowell. The 

 feet are shorter, the hind feet being twice as long as the head to the 

 posterior border of the tympanum, while in R. d. drayioni it is two and 

 five-tenths times as long. The R. onca lacks the black cheek-patch of 

 the R. d. draytoni. 



Utah, 1872; Dr. H. 0. Yarrow; alcoholic; female. 



RANA BOYLII Baird. 

 Proceerl. Ac. Pliila., 1855, p. 62. 

 Eana imcliyderma Cope, Proceed. Ac. Phila., 1883, p. 25. 



Tympanum small, very indistinct. A broad depressed ridge of skin 

 on each side of back. Skin finely tubercular above. Head broader than 

 long.. Tibia and femur more than half the leugth of body; the latter 

 the longer. Hind foot less than half this length ; webbed entirely to 

 the expanded tips; outer toe decidedly longer than the third. An 

 elongated tubercle at base of inner toe, with another opposite it. Above 

 dull reddish- olivaceous, with indistinct blotches and dark spots on the 

 back and fasciae on the legs. Beneath yellowish, mottled anteriorly^ 

 Inner faces of legs immaculate. 



Body rather stout. Limbs well developed. Tibia and femur very 

 long. Head short, broad ; outline rounded, although the tip is rather 

 acute. Nostrils small, situated on the crest of the decided canthus ros- 

 tralis about midway between the eye and the tip of the snout. Eyes 

 large, situated far back ; contained three times in the chord of the jaw 

 and one and a half diameters from the tip of snout ; less than half a 

 diameter from the rictus. A moderate excavation in front of the 

 eye. Tympanum very small and indistinct, not half the diameter of 

 the eye, covered with the small tubercles of the skin. A slight fold 

 of skin above it and proceeding toward the arm, met by an indistinct 

 thickening of the skin from the jaw, as in the typical species. Tongua 



