256 



Index 



Cypria exsculpta, 190. 



Cypridida;, 92, 97, loi, 107, 109, 



133, 138, 184, 190. 

 Cypridopsis vidua, 190. 



Dahl, 17. 



Danglade, 156, 157. 



Danish marine studies, 86. 



Daphnia, 216. 



Daphnia hyalina, 216. 



Daphnia pulex, 216. 



Darter, Iowa, 221. 



Darter, manitou, 221. 



Darter, tessellated, 215, 221. 



Davis, 53. 



Dawson, 47. 



Decapoda, 92, 94, 97, 138. 



Decodon verticillatus, 59-63, 66, 



77, 80. 

 Deer Point, 170. 

 Dero, 81, 83, 107, 184, 189. 

 Dero limosa, 107, 184, 189. 

 Detritui, 204. 

 Detritus eaters, 204, 200. 

 Dianthera, 70, y^, 78, 137. 

 Dianthera americana, 55, 58, 60, 



62, 63, 65-69, 80, 119, 193. 

 Diatoms, 81, 83. 

 Dibolia borealis, 103, 184, 200. 

 Didymops, 120. 

 Didymops transversa, 109, 184, 



Dij,'estion, rate of in fish, 211, 214. 

 Digestion, rate of in turtles, 211. 

 Dineutes assimilis, 97, 184, 199. 

 Diptera, 82, 94, 97, loi, 103, 107, 



109, 123, 127, 131, 133, 138. 

 Dipterous larvae, 105, 107, 109. 

 Dixidae, 97. 

 Donacia, 132, 205. 

 Donacia cinctiformis, 123, 184, 200. 

 Doolittle, 188. 



Dorosoma cepedianum, 217. 

 Douglas Lake, Mich., 53. 

 Dragon-fly, 195. 

 Dredge, Walker, 89. 

 Dryope, loi, 184, 199. 

 Duck Island, Ottawa, 162. 

 Duck-weed, 47, 75, 80. 

 Dust-fine detritus, 18, 41. 

 Dunham Island, 21, 27, 28, 31, ZZ, 



35, 37, 39, 55, 56, 72, I34-I37, 



139, 144, 145, 170, 188. 

 Dytiscidae, 205. 



ECHINODERMS, 9I. 



Eel grass, 53, 79. 



Egg production of mollusca, 158, 



159- 

 Ekman, 18, 19, 53, 89, 152. 

 Elbe River, 17. 

 Eleocharis, 51. 

 Eleocharis acicularis, 66, 68, 69, 



71, 79- 

 Elliptio companatus, yj, 78, 107, 



109, 113, 114, 117, 126, 128, 133, 



154, 159-161. 

 Elmis bivittatus, loi, 103, 107, 184, 



199- 

 Elodea, 47, 49, 51, 53, 64, 70, 81, 



152. 

 Elodea canadensis, 58, 60, 65-72, 



75, 79, 119. 

 Elophila, 92, 184, 197, 198. 

 Embody, 45, 103, 207. 

 Emydoidea, 211. 



Enallagma, 103, 107, 184, 194, 215. 

 Enchytra;idse, 92, 94, 97, loi, 103, 



184, 189. 

 Entomostraca, 190, 191. 

 Ephemera, 21. 

 Ephemerella, 109, 249. 

 Ephemerida, 82, 92, 94, 97, loi, 



103, 109, 138, 205. 

 Erpobdella punctata, 92, loi, 103, 



109, 127, 184, 188. 

 Esox rcticulatus, 215, 221. 

 Esox lucius, 221. 

 Etheosoma iowae, 221. 

 Eucrangonyx gracilis, 97, loi, 132, 



184, 192. 

 Eupomotis gibbosus, 214, 215, 220, 



221. 

 Eurycercus lamellatus, 92, 94, 97, 



loi, 103, 107, 133, 137, 184, 190, 



191. 



FaLLFISH, 220. 



Fernald, yS,. 



Filamentous algae, see algae. 



Finger Lakes, 31, 155. 



Fish culture, 87, 89. 



Fish caught in trap net, 212. 



Fitzgerald Point, 187. 



Food, amount eaten by fish in 24 



hours, 208-213, 219, 224. 

 Food, amount in measured area, 



86. 

 Food, consumption of by fish, 216. 



