. Bulletin. Natural history; Natural history. Plate Some Skokie mollusks 1. LymncBa reflexa Say. Adult. 2,3. Lymnaa reflexa crystalensis Baker. Immature reflexa. 4-8. Lymncea palustris michiganensis Walker. iuv&ca\& reflexa. 9-13. Physa gyrina Adult. 14-17. Physa oleacea Tryon. Immature gynwa. 18,19. Succinea ovalis optima Pilsbry. Possibly senile form of ovalis. 20. Succinea ovalis Say. 21. LymncBa parva sterkii Baker. 22. Ancylus parallelus Hald. (After Fig. 6, PL I., Hald. Monogr.) 23. Sirobilops virgo (Pilsbry). (After Fig. 120, Walker's Moll. Mich.) Figures 1—20 enlarg
. Bulletin. Natural history; Natural history. Plate Some Skokie mollusks 1. LymncBa reflexa Say. Adult. 2,3. Lymnaa reflexa crystalensis Baker. Immature reflexa. 4-8. Lymncea palustris michiganensis Walker. iuv&ca\& reflexa. 9-13. Physa gyrina Adult. 14-17. Physa oleacea Tryon. Immature gynwa. 18,19. Succinea ovalis optima Pilsbry. Possibly senile form of ovalis. 20. Succinea ovalis Say. 21. LymncBa parva sterkii Baker. 22. Ancylus parallelus Hald. (After Fig. 6, PL I., Hald. Monogr.) 23. Sirobilops 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. 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
