. Bulletin. Natural history; Natural history. 94 Illinois Natural History Survey Bulletin Vol. 28, Art. 1. Fig. 80.—Adult Rana areolata circulosa from Marion County, Illinois. The groundcolor is milky white; the closely crowded spots are brown or black. Rana areolata circulosa Rice & Davis Northern Crayfish Frog Gopher Frog Rana circulosa Rice & Davis 1878:355 (type locality: Benton County, Indiana; revised incorrectly to northern Illinois by Stejneger & Barbour 1943; corrected by Mittleman 1947; revised incorrectly to Richland County, Illinois, by Schmidt 1953). Rana areolata circ
. Bulletin. Natural history; Natural history. 94 Illinois Natural History Survey Bulletin Vol. 28, Art. 1. Fig. 80.—Adult Rana areolata circulosa from Marion County, Illinois. The groundcolor is milky white; the closely crowded spots are brown or black. Rana areolata circulosa Rice & Davis Northern Crayfish Frog Gopher Frog Rana circulosa Rice & Davis 1878:355 (type locality: Benton County, Indiana; revised incorrectly to northern Illinois by Stejneger & Barbour 1943; corrected by Mittleman 1947; revised incorrectly to Richland County, Illinois, by Schmidt 1953). Rana areolata circulosa, Davis & Rice 1883a: 28. Rana aerolata circulosa, Peters 1942:182. Rana areolata capita nee Le Conte, Yarrow 1882^:178. Rana capito nee Le Conte, S. Garman 1884:41. Rana areolata, H. Garman 1892:319-20. Diagnosis.—A large Rana (largest Illi- nois specimen mm. from snout to vent), fig. 80, with dorsolateral folds; con- spicuously mottled upper jaws; prominent hump at the middle of the back; tympanum always smaller than eye; large head; conical snout; and milky white groundcolor visible at the margins of the many closely crowded, round, black spots. Variation.—The female gopher frog av- erages larger than the male and possesses heavy glandular ridges under the tympa- nums. The male has a pair of saclike vocal pouches on the sides of the head and enlarged thumbs. Ten newly transformed specimens, rang- ing from to mm. in snout-vent length, differ from sexually mature adults by their proportionately larger heads, shorter legs, more distinctly spotted dorsums, and less distinctly barred legs. Head length in 10 juveniles ranges from to , averag- ing , per cent of the body length, whereas in 50 frogs over 57 mm. in snout-vent length it ranges from to , averaging , per cent. Tibia length for the 10 juveniles ranges from to , averaging , per cent of the body length, whereas in the 50 adult specimens it ranges from 34.
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
