AMERICAN FROGS OF THE GENUS RANA. 433 



Habitat. — Jalisco, Guanajuato, Plateau of Mexico, Tabasco, 

 Tehuantepec, and {fide Cope) Guatemala. — The types are from the 

 City of Mexico, where the frog is common on the market. 



The records of R. montezumce from Shoalwater Bay, Washington 

 Territory (3345, Col. J. D. Vaughan) and Upper ^Mississippi (3349, 

 Dr. J. G. Cooper), in Yarrow's Check-list of 1882, are due to confusion 

 with some other species. 



Measurements in Millimeters 



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

 ■9?9$9c?'?999 



From snout to vent 145 140 136 100 100 67 92 80 67 126 



Head 40 39 38 32 31 23 29 24 22 42 



Width of head 55 51 50 40 35 25 32 26 23 51 



Snout 15 13 13 12 10 7 9 8 7 13 



Eye 12 10 11 9 10 7 9 8 7 11 



Interorbital width 6 5 5 4 3.5 2 3 2.5 2 5 



Tympanum 9 9 9 9 9 6 7 6 5 8 



Fore limb 88 84 80 56 54 40 52 42 36 81 



1st finger 20 20 20 12 14 8 11 11 8 20 



2nd " 20 20 20 12 13 8 11 11 8 20 



3rd " 25 26 22 15 15 11 15 14 11 23 



4th " 22 20 20 11 12 7 10 9 7 20 



Hind limb 195 183 188 140 146 106 137 127 102 200 



Tibia 69 65 62 46 46 33 42 37 32 63 



Foot 72 69 68 50 51 40 50 42 38 68 



3rd toe 43 42 40 28 29 23 28 24 23 41 



4th " 58 56 58 42 45 35 42 37 33 59 



5th " 44 46 46 30 34 25 31 28 25 48 



1-3. Lazuna del Castillo, near Guadalajara (Paris Museum). — 4. Guanajuato 

 (Paris Museum) . — 5. City of Mexico. — 6-9. L.Texcoco. — ^10. L. Zapotlan. 



8. Rana halecina. 



Rana halecina (Kalm), Linn. Syst. Nat. I, p. 356* (1766); Daud., Hist. 

 Rain. Gren. Crap., p. 63 (1803), and Hist. Rept., VIII, p. 122 (1803); Harlan, 

 Journ. Ac. Philad., V, 1826, p. 337; Holbr., N. Am. Herp., I, p. 89, PI. xiii 

 (1836); DuM. and Bibr., Esp. Gen., VIII, p. 352 (1841); Holbr., op. cit., IV, 

 p. 91, PL XXII (1842); Dekay, N. Y. Faun., Rept. p. 62, PI. xx, fig. 49 (1842); 



4 This name, latinized by Linnaeus from Kahn's "SiUhoppetosser," appears 

 in the synonymy of Raria ocellata. 



