AMERICAN FROGS OF THE GENUS RANA. 471 



Eggs nearly entirely black, measuring 2 millimeters in diameter. 



Nasal bones small and widely separated from each other and from 

 the frontoparietals; ethmoid exposed and obtusely pointed in front; 

 zygomatic process of squamosal very short. Pectoral arch as in 

 R. temporaria. Terminal phalanges feebly expanded distally. 



Measuremenis in Millimeters . 



1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 



a^c^<:fcf99999999 



From snout to vent 55 53 49 47 63 63 50 58 57 46 42 40 



Head 19 18 17 16 20 20 16 20 20 15 15 14 



Width of head 22 20 19 18 24 24 19 23 25 18 17 16 



Snout 6 6 5.5 5 6.5 7 5.5 6 6 5 5 4.5 



Eye 6 6 5.5 6 6.5 7 5.5 6 6 5 5 4.5 



Interorbital width 3.5 4 3.53.5 44.53.5 4 43.5 3 3 



Tympanum 3 3 2.52.53.53.52.5 33233 



Fore limb 38 37 35 33 40 41 31 37 40 29 27 25 



1st finger 776698778665 



2nd " 6 6 5 5 8 7.5 6 6 7 5 5.5 5 



3rd " 10 9 8 8 10 9 8 9 10 8 8 8 



4th " 6 6 5 5 7 6 5 6 7 5 5 4.5 



Hind limbs 110 101 87 86 111 116 84 101 107 77 78 72 



Tibia 36 34 28 27 36 38 29 34 35 25 26 23 



Foot 35 32 27 27 35 34 26 32 33 25 24 22 



3rd toe 20 18 15 15 20 19 15 17 19 14 13 12 



4th " 30 27 23 23 29 29 22 26 28 21 20 18 



5th " 23 20 18 18 23 21 16 19 22 15 14 13 



1-7. Palo Alto.— 8. Mt. Diablo.— 9. Camp Taylor, Marion Co.— 10. L. 

 Tahoe.— 11-12. Mill Valley. 



Habitat. — Oregon and California, up to 11,500 feet altitude. 



19. Rana pustulosa. 



Rana pmtvlosa Botjleng., Ann. and Mag. N. H. (5) XI, 1883, p. 343; 

 GtJNTH., Biol. C.-Am., Rept. p. 202, PI. lxi, fig. 2 (1900); Bouleng., Ann. and 

 Mag. N. H. (9) III, 1919, p. 411. 



Vomerine teeth in short oblique series extending beyond the level 

 of the posterior borders of the choanse, nearer to each other than to the 

 latter. 



Head broader than long, rather strongly depressed; snout rounded, 

 feebly projecting beyond the mouth, as long as the eye; canthus 

 rostralis distinct; loreal region moderately oblique and deeply con- 



