AMERICAN FROGS OF THE GENUS RANA. 



431 



Measurements in Millimeters 



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



6^0^0^9999999 9 



From snout to vent.. 56 50 50 52 51 43 36 32 35 33 36 



Head 20 18 18 17 17 13 12 11 12 11 11 



Width of head 20 18 18 17 17 13 12 11 12 11 11 



Snout 6 6 6 6 5.5 4 3.5 3.5 3 3 3 



Eye 6 6 6 6 5.5 5 4 3.5 4 4 4 



Interorbital width..2.5 1.5 1.5 2 2 1.5 1 1.5 1 1.5 1 



Tympanum 6 6 6 5 4 3.5 3 3 3 2.5 2.5 



Fore limb 30 26 26 27 27 25 21 18 20 16 17 



1st finger 6 5.5 6 6 5.5 4 3.5 3.5 3.5 3.5 3.5 



2nd " 6 5 5.5 6 5.5 4 3.5 3.5 3.5 3 3 



3rd " 8 7 8 8 7 5.5 5 5 5 5 5 



4th " 6 4.5 5 5 5 3.5 3.5 3 3 3 3 



Hind limb 80 74 70 75 73 64 55 44 51 46 46 



Tibia 23 21 20 21 21 18 15 12 14 13 IS 



Foot 29 27 26 27 26 21 19 15 17 16 16. 



3rd toe 17 15 15 16 ? 12 11 9 10 10 10 



4th " 24 23 22 24 ? 19 17 13 15 14 14 



5th " 19 16 16 17 ? 12 11 9 10 10 10 



1-8. Lakehurst, New Jersey. — 9-11. Lake ElHs, N. Carolina. 



The species does not exceed a length of 60 millimeters from snout to 

 vent, and may be regarded as a dwarfed form derived from the R. 

 catesbiana t^^e. 



7. Rana montezumse. 



Rana montezumce Baird, Proc. Ac. Philad., 1855, p. 61; Girard, Rep. U. S. 

 Mex. Bound. Surv., Kept. p. 27, PL xxxvi, figs. 1-6 (1859); BROccm, Miss. 

 Sc. Max., Batr. p. 14, PI. iv, fig. 2 (1881); Bouleng. Cat. Batr. Ecaud., p. 35 

 (1882) ; DuGlis, Naturaleza (2) I, 1888, p. 137; Cope, Batr. N. Am. p. 428, 

 figs. (1889); GuNTH., Biol. C.-Am., Kept. p. 197 (19 JO); Botileng., Ann. and 

 Mag. N. H. (9), III, 1919, p. 409. 



Rana adirita Troschal, in Miiller's Reis. Ver. Stat. HI, Wirbelte, p. 82 (1865). 



Rana montezumce concolor Cope, Bull. U. S. Nat. Mus., No. 32, 1887, p. 20. 



Vomerine teeth in small transverse or oblique groups between or 

 just behind the choanse. 



Head broader than long, much depressed; snout rounded, scarcely 

 projecting beyond the mouth, as long as the eye or a little longer; 



