10 RANIDA. 
Inner metatarsal tubercle compressed ; snout 
DOMED ee es ace eee ele bee eens 8 51. arvalis, p. 45. 
b. Tibio-tarsal articulation reaching beyond the tip of the 
snout. 
Tympanum not two thirds the width of the 
eye; first finger not extending beyond 
second; belly spotted ...........4-- 53. iberiea, p. 46. 
Tympanum hardly two thirds the width of 
the eye; belly spotted ............-. 54. latastii, p. 46. 
Tympanum nearly as large as the eye, close 
to it; belly immaculate.............. 55. agilis, p. 46. 
Snout very long; no outer metatarsal tu- 
GHGS Mut fois eee te kath ea abomene 57. japonica, p. 47. 
B. Tips of fingers and toes dilated into 
large disks; belly granulate.... 107. buerger?, p. 73. 
Il. AmMpRICAN SPECIES. 
A. Tips of toes not dilated. 
1. The web extends to the tip of the fourth toe. 
Tympanum nearly as large as the eye; 
tibio-tarsal articulation not reaching the 
BYR coke oss Satta) phe Bos ae 34. montezume, p. 35, - 
Tympanum as large as or larger than the 
eye; tibio-tarsal articulation reaching the 
PROM Tihs fo) ei ais oe ee em 35. catesbiana, p. 36. 
2. Toes at least three-fifths webbed, the web not extending 
to the tip of the fourth toe. 
a. Tympanum as large as or larger than the eye. 
First finger not extending beyond second .. 36. clamata, p. 36. 
>. Tympanum smaller than the eye. 
a. Vomerine teeth between the choane. 
Habit stout; skin porous .../..../ che. 37. septentrionalis, 
Head moderate ; tympanum nearly as large [p. 37. 
as the eye; glandular lateral fold mode- 
PEERLESS Ree pic tos cit Fy sa ads coy caged onsmctsl poke 43. halecina, p. 41. © 
Head moderate; male with external vocal 
BAU Ei WOE PiU ae cies fe fe aa et win le yeaa ee 41. utricularia, p. 40. 
Head large ; male with external vocal sacs. 42. areolata, p. 41. 
Tympanum nearly as large as the eye; 
glandular lateral fold very broad ...... 44, palustris, p. 42. 
Tympanum about half the size of the eye.. 45. macroglossa, p. 42. 
Tympanum nearly as large as the eye ; first 
finger not longer than second ........ 46. maculata, p. 42. 
