557 



Cragin, F'. W. — Continued. 



t)ii occurrence ol Hetero- 



cope ill Nortli America, 



225. 

 Craspedomonadidie, 328. 

 crassicaudis, Cyclops, 2(). 

 cratera, Codonella, 312, 313, 335, 



336, 351. 364, 365- 

 Difflugia, 336. 

 Crayfishes, examination of, for Pro- 

 tozoa, 310. 

 Opercularia irrital)iiis found on, 

 340. 

 Croppie, Anuriea coclilearis eaten 



by, 351- 

 Crustacea, 355. 



as food of rotifers, 341;. 

 examination of, for Proto/oa, 



310, 312. 

 rotifers as food of, 351. 

 Cryptomonadidie, 328. 

 Cryptomonas, 328. 



ovata, 313, 328. 

 Ctenochiton nuytisia?. Fuller on 



validity of, 394. 

 curva, Cutluirnia, 341. 

 Cyclodininte, 331. 



Cyclopid;e, A Contribution to a 



Knowledge t)f North American 



Fresh-water, 27-82. (Special 



index, \i. 83.) 



ex])laiiation of plates of, 81, 82. 



from liigh lakes and ponds, 62. 



list t)f articles consulted in E. B. 



Forbes's article on, 66-81. 

 list of Nortli American species 



of, 63-65. 

 most abundant species of, in 



Great Lakes, 62. 

 of the Illinois Ki\er at the Illi- 

 nois Biological Station, 63. 

 preservative of, 31. 

 specific characters of, 29-31. 

 Cyclops, 27, 28, 31, 63, 97, 100, 105, 

 106, 132, 141, 225, 234, 274, 421. 



Cyclops — Continued. 

 attinis, 29, 31, 65. 

 agilis.29. 

 albidus, 29, 47-49, 62, 63, 64. 



description of, 48. 



distribution of, 48. 



syiioiiNiny of, 48. 

 americanus, yj, 38, 42. 

 annulatus, 33, 35. 

 ater, 29, 49-51, 62, 64. 

 bicolor, 29, 62, 63, 64. 

 l)icuspidatus, 29, 30, 44-47, 53, 

 62,63, 64. 



description of, 45. 



distribution of, 47. 



synonymical discussion of, 44. 

 l)isetosus, 29. 

 bre\ispinosus, 39, 41. 

 capilliferus, 51. 

 crassicaudis, 29. 

 Diaptoniiis, and Osphranticum, 



relati\ e hardihood of, loo. 

 dybowskii, 29, 62, 63. 

 edax, 33-36, 62, 63. 



description of, 35. 



distribution of, 35. 



synt)nymy of, and comjiarison 

 witli other species, 33. 

 fimbriatus, 29. 



\'ar. popjiei, 63, 65. 

 flmiatilis, 57. 

 forbesi, 44, 45. 

 fuscus, 29, 64. 

 general distril)ution of, in North 



America, 62. 

 gigas, 29, 37. 

 gyrinus, 47, 48. 

 helgolandicus, 29. 

 hyalinus, 29. 

 in gens, 37. 



insectus, 37, 38, 39, 41- 

 insignis, 29, 63. 

 lacustris, 29. 

 leeuwenhoeckii, 34, 35. 

 leuckarti, 29, 31-33, 34, 36, 63. 



