Cope.] 5^0 [Oct. 1, 



R. C. LATIREMIS Cope. 



This form looks very different from the true Rana cantabridgensis. 

 Muzzle rather ohtuse, more so than in the typical R. cantabridgensis, and 

 widened posteriorly ; its length at the posterior edge of the tympana en- 

 tering the length of the head and body three and a half times. The tym- 

 panic drum is very distinct, and its long diameter enters that of the eye 

 two-thirds of a time. The nostrils are equidistant between the orbit and 

 the end of the muzzle, and look upwards. The skin is quite smooth 

 everywhere, and the dorsolateral fold is easily obliterated by immersion 

 in alcohol. The heel of the extended hind leg reaches to the middle of 

 the eye ; the second toe reaches nearly to the apex of the knee. The 

 palmation is remarkably wide, leaving but one free phalange and all the 

 digits except the fourth, where two are free. The internal cuneiform 

 tubercle is quite prominent, with an obtuse convex edge ; there is no ex- 

 ternal tubercle. The internal finger (index) is short and stout, and is 

 very little or not at all longer than, the second (third) finger. 



Color, above, light brownish-gray ; below, white. There are more or 

 less numerous black spots on the sides, which incline to fuse more or less 

 imperfectly into a longitudinal band along the dorsolateral dermal fold. 

 There are in some specimens a few small black marks on the back between 

 the lateral folds. A dark line along the canthus rostralis. The black 

 "ear patch" is reduced to a black line, which passes from the eye pos- 

 terior to the tympanic disk, and ceases opposite the inferior border of the 

 latter. 



Measurements (iVo. 18,723). M. 



Length of head and body 052 



Width of head at posterior edge of tympana 019 



Length of " " " " " " 015 



Length of fore limb 022 



" " foot Oil 



" " hind limb to groin 071 



"tibia 020 



" "tarsus 012 



" " remainder of foot 025 



Four specimens from Lake Alloknagits, Alaska ; obtained by C. L. 

 McKay. 



R. c. cantabridgensis Baird. 



Hudsonian district of Eastern region. 



Rana agilis Thomas. Rana temporaria, var. arvalis part Giinth., Cat., 

 p. 16. Rana temporaria Millet, Faune Maine et Loire, ii, p. 664. 

 Rana agilis Thomas, Ann. Sc. Nat., se>. 4, iv, p. 365, pi. 7. Rana 

 gracilis Fatio, Rev. Mag. Zool., seY. 2, xiv, p. 81. Rana temporaria, 

 var. agilis Schreb., Ilerp. Eur., p. 125. 

 Middle latitudes of Europe (Boulenger). 



