226 



NOKTH AMERICAN FAUNA. 



[No. 7. 



Rana pretiosa B. & G. 



The remarks under B. aurora refer as well to the present species. 

 The southern specimens which have come under my notice have the 

 white (or yellow) supralabial stripe ill-defined and more or less inter- 

 rupted, especially behind the angle of the mouth; while in the northern 

 specimens this stripe usually is well-defined and uninterrupted. 



List of specimens of Rana pretiosa. 



U.S. 





Nat. 



Sex and 



Mns. 



age. 



No. 





18928 



ad. 



18929 



ad. 



18930 



ad. 



18931 



ad. 



18932 



ad. 



18933 



adol. 



18934 



adol. 



18935 



adol. 



18936 



adol. 



18937 



adol. 



18938 



JUV. 



18939 



ad. 



18910 



ad. 



18941 



ad. 



18942 



adol. 



18943 



JUV. 



18944 



adol. 



18945 



adol. 



18946 



ad. 



Locality. 



Alti- 

 tude. 



Date. 



Collector. 



Item arks. 



Sierra Nevada, Calif 



Mulkey Meadows, Sierra Nevada, 



Calif. 

 do 



Chiquito, San Joaquin River, Calif.. 



.do 



Head of Big Cottonwood Creek, Calif 



.do 

 .do 

 .do 

 .do 

 .do 



Feet. 

 8,4U0 

 9,000 



9,000 

 9,800 



9,800 

 11,000 



July 24 

 ....do ... 



....do ... 

 July 31 



...do ... 



Sept. 11 



11.000 

 11, 000 

 11, 000 



li, ooo 



11, 000 



Whitney Creek, Calif 



East Fork Kaweah River, Calif 10, 200 



do 



do 



do , 



Mineral King, Calif 



Lone Pine, Calif 



South Fork Merced River, Calif 



Sept. 13 

 ....do ... 

 ....do... 

 ....do ... 

 ....do ... 

 Aug. 18 

 Aug. 7 



10,200 ...:do ... 



10,200 do ... 



10,200 |....do ... 

 July 31 

 Aug. 21 

 July 31 



7,500 

 8,"800 



Stephens 

 ...do.... 



...do .. 



Nelson. 



...do .... 

 Dutoher . 



...do .. 



...do .. 

 ...do .. 

 ...do .. 

 ...do .. 

 Bailey . 

 ...do... 

 ...do .. 

 ...do .. 

 . . .do . . 

 . . .do . . 

 Fisher. 

 Nelson. 



Head of river 

 east of Mt. 

 Raymond. 

 Do. 



Near Mount 

 Whitney. 



In little lake. 

 Do. 

 Do. 

 Do. 



Rana boylii Baird. 



In a recent paper* (December, 1891) Boulenger expresses the opinion 

 that B. boylii is only a synonym of B. draytonii. It is evident that 

 he has arrived at this conclusion without having had opportunity to 

 compare authentic specimens of both species, for otherwise it would be 

 impossible to make such a mistake. The two species differ in all essen- 

 tial points, and among the many puzzling Western forms of this genus 

 none are more easily separated. Dentition, tympanum, and dorso- 

 lateral glands are so different that once seen the two species can not well 

 be confounded. B. boylii has the tympanum almost concealed and cov- 

 ered with tubercles, the vomerine teeth in an oblique longitudinal series 

 on each side, and the dorsolateral fold flattened out so as to be nearly, 

 or entirely, imperceptible, while B. draytonii has a smooth, distinct 

 tympanum, vomerine teeth in clusters, and very prominent dorso-lateral 

 folds. 



The specimens which I have referred to B. boylii differ from the type 

 of the latter in a few minor points, chief of which is the narrowness of 

 the tongue; but as the specimens are rather small, much stress ought 

 not to be attached to this point. Moreover, I would again refer to my 



*Ann. Mag. Nat. Hist. (6), vm, p. 453. 



