. A final report on the Crustacea of Minnesota, included in the orders Cladocera and Copepoda, together with a synopsis of the described species in North America, and keys to the known species of the more important genera . PLATE E. Fig. 1. Alona quadrangular is, female. A. anteunule. Lb. labrum. Md. mandible. P-a. post-abdomeu. Au. anus. F, c. musculus flexor c. musculus extensor caudalis. A. g. anal gland,n. g. nutritive globule in embryo, t. tail of , II, III, IV, V. five pairs of feet of embryo, mx. maxillaof embryo, at^. antennae of embryo, at^ antennulesof embryo. H.
. A final report on the Crustacea of Minnesota, included in the orders Cladocera and Copepoda, together with a synopsis of the described species in North America, and keys to the known species of the more important genera . PLATE E. Fig. 1. Alona quadrangular is, female. A. anteunule. Lb. labrum. Md. mandible. P-a. post-abdomeu. Au. anus. F, c. musculus flexor c. musculus extensor caudalis. A. g. anal gland,n. g. nutritive globule in embryo, t. tail of , II, III, IV, V. five pairs of feet of embryo, mx. maxillaof embryo, at^. antennae of embryo, at^ antennulesof embryo. H. heart. Sh. g. shell gland. Ov. m. muscle of mandible. At.^m. muscle of eye, s. ce. g. supra-cesophagal ganglion. P. F. pig-ment fleck. brain, eye and pigment fleck of procurvus, female,foot of excisa, female; 6a. shell of same,antennae of latissima, media, macrurus, post-abdomen,lower angle of shell of same. Fig. 2. Fig. 3. Fig. 4. Fig. 5. Fig. 6. Fig. 7. Fig. 8. Fig. 9. Fig. 10. Fig. 10a, MINNESOTA CRUSTACEA. 121/^ Annual Report PLATE E. GeoL & IfiU. Hist. Sur. Min n. - LJLJ , t q/. y#r^^c«. PLATE F. Fig. ]. Chijdorus globosus. Fig. 2. do., first foot. Fig. 3. do., eud of post-abdomen. Fig. 4. Chydorns spliicricus^ mdXc. Fig. 5. Chydonis nitidus, post-abdomen of female. Fig. 6. Chydorus nitidus, head. Fig. 7. Chydorus spluericus^ ephippial female. Fig. 8. do., female. Fig. 9. Chydorus globosus, post-abdomen of male. Fig. JO. Chydorus sphxrricus^ from above. Fig. 11. Chydorus oralis. Fig. 12. Chydorus ccdatus. Fig. 13. Crepidocercus setiger. Fig. 14. Alona offinis. Fig. 15. Pleuroxus unidens; 15a. antenna. MINNESOTA CRUSTACEA. 1^ tfi Annual/it^porf PLATE F. Geo I & 2^at Hist Siir
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