. Bulletin. Natural history; Natural history. m ^Si ^>^v/. Fig. 237.—An adult Natrix rhombifera rhombifcra from Alexander County. Illinois. The groundcolor above is dull yellow; the markings are olive or brown. Table 81.—Sexual variation in Illinois Natrix rhombifera rhombifera. Figures in paren- theses are numbers of specimens. Characteristic Males (16) Females (25) Range Mean Range Mean Caudals 71-82 59-68 Tail length as percentage of total length A. Please note that these images are extracted from scanned page images that may have been digitally en

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. Bulletin. Natural history; Natural history. m ^Si ^>^v/. Fig. 237.—An adult Natrix rhombifera rhombifcra from Alexander County. Illinois. The groundcolor above is dull yellow; the markings are olive or brown. Table 81.—Sexual variation in Illinois Natrix rhombifera rhombifera. Figures in paren- theses are numbers of specimens. Characteristic Males (16) Females (25) Range Mean Range Mean Caudals 71-82 59-68 Tail length as percentage of total length A. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division

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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory