196 



Part III. — Twenty-\ 



■third Annual Report 



Duncker, Dr, (16) 228 ; (18) 226. 



Duration of reproductive life, (10) 238. 



Durham, Mr Herbert E., (6) 280. 



Dusky Perch. See Serranus gigas. 



Dutch fisheries, (6) 15, 307. 



fishermen, (10) 209. 



Duthie, Mr Robert, (9) 177, 181 ; (10) 

 202, 288, 289 ; (11) 242, 246 ; (12) 17, 

 187,218; (13) 15, 174; (14) 15, 229, 

 &c. 



Dyopedos porrecta, (9) 308. 

 Dyspontius curticaudatus (23) 148. 



■ normani, (20) 473. 



striatum, (6) 232. 



E 



Earth worms as bait, (7) 356. 

 East Coast fisheries, development of, (10) 

 16. 



Ebalia cranchii, (6) 257. 



tuberosa, (6) 257 ; (15) 130 ; (20) 536. 



Echinocardiiim cordatum, (15) 162 ; (20) 



317, 319, 324. 



flavescens, (20) 317, 319, 324. 



Echinocyamus pusittus, (6) 230 ; (20) 316, 



319, 324, 510, 527. 

 Echinoderms of Cromarty Firth, (20) 304. 



of Loch Fyne, (15) 160. 



of Moray Firth, (20) 304. 



as food of cod, (4) 136, 145. 



as food of haddocks, (4) 129. 



Echinopleura acideata, (19) 236, 272. 



Echinus acutus, (20) 315, 319, 324. 



escidentus, (7) 324 ; (15) 162 ; (20) 



316, 319, 324. 

 miliaria, (6) 230 ; (15) 162 ; (20) 315, 



319, 324. 



norvegicus, (20) 315, 319, 324. 



■ sphtera, (7) 347. 



Echiurus oxyurus, (8) 332. 

 Echthrogaleus coleoptratus, (18)156; (19) 



125 ; (20) 292. 

 Ectinosoma armiferum, (13) 166. 

 atlanticum, (9) 301, 302 ; (15) 149, 



307, 315 ; (20) 532. 

 curticorne, (13) 166 ; (15) 149 ; (17) 



253 ; (21) 113. 



erythrops, (8) 318 ; (16) 267. 



gracile, (13) 166; (17)253; (18) 389; 



(21) 113. 



herdmani, (13) 166 ; (15) 149 ; (17) 



253 ; (21) 113. 



longicorne, (13) 166. 



melaniceps, (8) 318 ; (15) 149 ; (20) 



457, 492. 



normani, (13) 166. 



propinquum, (13) 166. 



pygmaum, (13) 166 ; (15) 149. 



sarsi, (15) 149 ; (20) 503, 511. 



spinipes, (6) 239. 



tenuicorne, (13) 166. 



tenuipes, (13) 166. 



Edington, Dr A., (6) 207 ; (7) 12, 368. 

 Edwardsia callimorpha, (15) 163. 



camea, (15) 163. 



Eel, common (Anguilla tmlgaris), (15) 



113; (18) 288. 



composition of, (5) 228. 



digestibility of, (5) 228. 



Eel, eggs of, (8) 356. 



external differences between males 



and females, (13) 203. 



fecundity of, (8) 356. 



female reproductive organs of, (13) 



198 



food of, (20) 487, 533. 



larva? of, (13) 333. 



male, (13) 202. 



male, reproductive organs of, (13) 



198. 



migration and reproduction of, (8) 



354; (13)206. 



migrations of, (8) 354. 



oil-globules in intraovarian eggs of, 



(16) 98. 



pathological changes in, (12) 295. 



problems remaining to be solved, 



(13) 218. 



reproduction of, (13) 14, 192. 



ripe eggs of, in June, (4) 212. 



spawning period of, (4) 253. 



young of, (3) 63 ; (13) 213. 



pout. See Burbot. 



Eel, conger. See Conger eel. 

 Effect of hooks of liners on fish-food, (12) 

 19. 



Egeon fasciatus, (16) 156, 157, 209. 

 Eggs of fishes, absorption of water in 



maturation of, (16) 116. 



absorption of yolk in, (16) 211. 



artificial hatching of, (7) 403. 



attached to zoophytes, (3) 69. 



change in specific gravity of, 



at maturity, (16) 115. 

 change in volume in demersal. 



during maturation, (16) 141. 

 change in volume in pelagic, 



during maturation, (16) 141. 

 changes in constituents of, 



during maturation, (16) 146. 

 changes in percentage of water 



in, during maturation, (16) 143. 

 changes in specific gravity of 



pelagic, during maturation, (16) 142. 

 character of yolk in demersal, 



(16) 132. 



characters of embryo from 



demersal and pelagic, (16) 90. 



characters of protoplasm of, 



(16) 136. 



chemical composition of ger- 

 minal vesicle, (16) 137. 



chemical composition of yolk 



of, (16) 136. 



chemical composition of vitel- 

 line membrane, (16) 137. 



collected by " Garland," (10) 



300, &c. 



comparison of those of herring 



and sprat, (6) 304. 

 comparison of yolk in demersal 



and pelagic, of teleosteans, (16) 89, 



90. 



demersal, modes of attachment 



of, (16) 93. 



development of , in ovaries, (12) 



386. 



different character of yolk in 



demersal and pelagic, (16) 98, 99. 



