. Bulletin of the Illinois State Laboratory of Natural History. Natural history. 12 I'i. ^^'^^* ^ 22 23 Some Skokie mollusks 1. Lynincea reflexa Say. Adult. 2,3. Lymnaa reflexa crystalensis Baker. Immature reflexa. 4-8. Lymnaa palustris ntichiganensis Walker. Juvenile re^e^ra. 9-13. Physa gyrina Say. Adult. 14-17. Physa oleacea Tryon. Immature gj'J'jjja. 18, 19. Succinca ovalis optima Pilsbry. Possibly senile form of ovalis. 20. Succinea ovalis Say. 21. Lymncra parva sierkii Baker. 22. Ancylits parallelus Hald. (After Fig. 6, PL I., Hald. Monogr.) 23. Strobilops virgo (Pilsbry). (After Fig. 12
. Bulletin of the Illinois State Laboratory of Natural History. Natural history. 12 I'i. ^^'^^* ^ 22 23 Some Skokie mollusks 1. Lynincea reflexa Say. Adult. 2,3. Lymnaa reflexa crystalensis Baker. Immature reflexa. 4-8. Lymnaa palustris ntichiganensis Walker. Juvenile re^e^ra. 9-13. Physa gyrina Say. Adult. 14-17. Physa oleacea Tryon. Immature gj'J'jjja. 18, 19. Succinca ovalis optima Pilsbry. Possibly senile form of ovalis. 20. Succinea ovalis Say. 21. Lymncra parva sierkii Baker. 22. Ancylits parallelus Hald. (After Fig. 6, PL I., Hald. Monogr.) 23. Strobilops virgo (Pilsbry). (After Fig. 120, Walker's Moll. Mich.) Figures 1—20 enlarged H diameters; fig. 21 enlarged 3 diameters; fig. 22 greatly enlarged; fig. 23 enlarged about 10 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 State Laboratory of Natural History. Bloomington, Ill. : The Laboratory
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectnatural, bookyear1876
