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132 CALIFORNIA ACADEMY OF SCIENCES [Oc Papers miles from Saugus, Placenta Canyon, Santa Anita Wash, Sierra Madre, Rustic Canyon in the Santa Monica Mountains, El Nogal), San Bernardino (Victorville, Oro Grande, Colton), Riverside (Riverside), and San Diego (Witch Creek, San Diego, Campo, San Felipe Valley, Sentenac Canyon, Boulder Creek, Lakeside), counties. In Lower California, it has been secured in the San Pedro Martir Mountains, and at La Grulla, San Tomas, and Rancho San Antonio. Habits.— This frog is probably the best known in California, and as food is considered to be more desirable and more delicate than the introduced Bullfrog. It usually inhabits still water, and is found in ponds, lakes, and marshes, although it is occasionally found in running streams. The specimens from Lower California in the Academy's collection, were taken in small ponds at an elevation of 8,000 feet, in the San Pedro Martir Mountains. Rana cantabrigensis Baird Northern Wood-frog Rana cantabrigensis Baird, Proc. Acad. Nat. Sci. Phila., VII, 1854, p. 62 (type locality, Cambridge, Mass.) ; Boulenger, Bull. Soc. Zool. France, 1880, p. 209; Boulenger, Cat. Batrach. Salient. Brit. Mus., 1882, p. 45; Dickerson, Frog Book, 1906, p. 211; Stejneger & Barbour, Check List N. Amer. Amph. Rept., 1923, p. 35; Pratt, Verteb. Animals of the U. S., 1923, p. 182. Rana cantabr-igensis cantabrigensis Cope, Bull. U. S. Nat. Mus., No. 34, 1889, p. 436, fig. 110. Rana cantabrigen'^is latij-e^nis CoPE, Proc. Amer. Philos. Soc, XXIII, 1886, p. 520 (type locality. Lake Alloknagik, Alaska) ; Cope, Bull. U. S. Nat. Mus., No. 34, 1889, p. 435, fig. Ill; Dickerson, Frog Book, 1906, p. 212; Stejneger & Barbour, Check List N. Amer. Amph. Rept., 1917, p. 37; Dice, Occas. Papers Mus. Zool. Univ. Mich., No. 85, 1920, pp. 7, 11; Patch, Copeia, 1922, No. Ill, p. 77; Hardy, Rep. Prov. Mus. Brit. Columbia, 1925, p. c24. Description. — Head about as broad as long, depressed, snout oval, projecting beyond mouth; nostril about equidistant from eye and tip of snout; distance between nostrils greater than interorbital width. Interorbital width about equal to width of upper eyelid. Tympanum small, distinct, oval in outline. Limbs slender; digits third much the moderately long, first and second about equal, longest; hind limbs moderately long; heel reaching to about middle of orbit. Inner metatarsal tubercle elongate, prominent; outer metatarsal tubercle absent; web very full; two phalanges of fourth
' No. 16] AMPHIBIANS OF WESTERN NORTH AMERICA J 33 toe free. Skin smooth; a well developed dorsolateral fold. The vomerine teeth are in two small rounded groups between the choanae. The color in alcohol is brownish, with two wide dorsolateral stripes of gray, the area between these stripes being spotted with reddish oval markings, bordered with black. Some individuals have a narrow dorsal stripe reaching from the tip of the snout to the vent. The sides are grayish, spotted with black, the dorsolateral stripe sometimes having a black border, extending through the orbit and along the canthus rostralis to the tip of the snout. A large triangular patch of black back of the orbit covers the tympanum. The limbs are barred or spotted with black. A grayish stripe borders the upper jaw. The under surfaces are grayish or yellowish, the abdominal region sometimes spotted with black. Measurements of 6 Specimens in the Collection of the Museum OF Vertebrate Zoology, University of California Snout to vent 36 38 40 41 48 49 Snout to orbit 7 7 6 7 8 7 Width of head 16 15 15 16 20 20 Interorbital width 2 2 3 3 3 3 Vertical diameter of tympanum 2 2 2 3 3 3 Fore limb 23 22 22 26 23 26 Hind limb 58 60 65 70 75 70 Length of tibia 18 21 21 22 25 26 Length of foot 10 19 20 25 28 25 Distribution.— This frog ranges from Michigan westward to Minnesota, northward through Canada to British Columbia, Great Slave Lake and Alaska. In Alaska it has been taken at Yakutat and Lake Alloknagik. British Columbia records are Hazelton, Atlin, Meadow Lake, twenty miles north of Clinton, and the Kispiox Valley, twentythree miles north of Hazelton. Rana pretiosa Baird & Girard Western Spotted Frog Plate 21, figure 2 Rana pretiosa Baird & Girard, Proc. Acad. Nat. Sci. Phila., VI, 1853, p. 378 (type locality, Puget Sound) ; Baird, Proc. Acad. Nat. Sci. Phila., 1854, p. 62; Baird, Proc. Acad. Nat. Sci. Phila., 1855, p. 378; Girard, U. S. Explor. Exped., Herpetology, 1858, p. 20, pi. II, figs. 13-18; Cooper, Rep. Pac. R. R. Surv., XII, Pt. II, 1860, p. 304; Cope, U. S. Geol. Surv. Terr., 1871 (1872),
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Occasional Papers OF THE CALIFORNIA
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To the memory of JOHN VAN DENBURGH
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CONTENTS PAGE INTRODUCTION 9 Synops
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No. 16] AMPHIBIANS OF WESTERN NORTH
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THE AMPHIBIANS OF WESTERN NORTH AME
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no. 16] amphibians of western north
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