Marsh—North American Species of Cyclops . 
1099 
than pools. It is one of the common species in the limnetic 
regions of the Great Lakes. 
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CYCLOPS PHALERATUS Koch. 
Plate LXXIX, fig. 9; plate LXXX, figs 1-6. 
Cyclops phaleratus Koch, H 21, pi. IX. 
“ canthocarpoides Fischer, p. 426, pi. X, figs. 24, 25, 32-38. 
“ “ Lilljeborg, p. 208. 
“ “ Claus, p. 37, pi. I, figs. 6-10. 
“ “ Claus, p. 102, pi. IY, figs. 1-4. 
“ “ Lubbock, p. 202. 
“ phaleratus Sars, p. 255. 
“ canthocarpoides Fric, p. 223, fig. 19. 
“ lascivus Poggenpol, p. 72, pi. XY, figs. 22-24, pi. XYI, figs. 
7 and 8. 
“ Fischeri Poggenpol, p. 73, pi. XY, fig. 28, pi. XVI, figs. 
12-15. 
“ phaleratus Uljanin, p. 38, pi. IX, figs. 1-5. 
“ “ Brady, p. 116, pi. XXIII, figs. 7-13. 
“ adolescens Herrick, p. 231, pi. YI, figs. 15-20. 
“ perarmatus Cragin, p. 7, pi. I, figs. 9-18. 
“ phaleratus Herrick, p. 161, pi. R, figs. 6-10. 
“ “ Daday, p. 252. 
“ “ Herrick, p. 14, pi. YII, figs. 2, a-d. 
“ “ Sostaric, p. 74, pi. II, figs. 21-22. 
“ “ Lande, p. 75, pi. XX, figs. 126-136. 
“ “ Brady, p. 25, pi. IX, fig. 2. 
“ “ Richard, p. 238, pi. YI, fig. 12. 
“ “ Schmeil, p. 36. 
“ “ Lande, p. 171. 
“ “ • Schmeil, p. 170, pi. VIII, figs. 1-11. 
“ “ Marsh, p. 216, pi. YI, figs. 6 and 7. 
“ “ Herrick, and Turner, p. 120, pi. XVII, figs. 1-7, 
pi. XVIII, figs. 2-2d, pi. XIX, fig. 1, pi. XXI, 
figs. 6-10. 
“ “ Marsh, p. 19. 
“ “ Forbes, p. 59, pi. XX, fig. 3. 
“ “ Lilljeborg, p. 105, pi. VI. figs. 20-21. 
“ “ Graeter, p. 499. 
“ “ Byrnes, p. 31, pi. XY, figs. 1-9. 
The cephalothorax (Pl. LXXX, fig. 1) is elliptical; its 
breadth is two thirds of its length. The first segment comprises 
nearly one-half of its length. The fifth segment is armed pos¬ 
teriorly with a row of spines. 
