I 
IcELAND, race of herring at, (17) 282. 
— statistics of catches of trawlers at, 
(20) 135. ® 
Tchthyobdella anarrhiche, (19) 140. 
hippoglossi, (19) 140. 
marina, (19) 140. 
sanguinea, (19) 140. 
Ichthyological notes, (4) 222; (19) 282; 
(22) 281 ; (23) 251. 
—- research, committee on, (21) 38. 
Idothea baltica, (16) 168, 210; (20) 489, 
505, 5195 525, 527: 
emargeata, (6) 252; (16) 168, 169, 
» 210; (19) 271 ; (20) 500, 519. 525. 
granulosa, (20) 479. 
linearis, (6) 252 ; (16) 168, 169, 210; 
(19) 2715 (20)519: 
—— marina, (6) 252; (14) 165. 
neglecta, (22) 243, 257. 
pelagica, (6) 252; (15) 135; (19) 
271; (20) 500, 519, 533. 
tricuspidata, (6) 252 ; (15) 135. 
Idya cluthe, (17) 259 ; (19) 250. 
Surcata, (4) 153; (6) 241; (15) 153; 
(20) 511. 
gracilis, (13) 171 ; (15) 153. 
longicornis, (15) 153; (19) 251. 
minor, (15) 153 ; (19) 251. 
Tlyocryptus sordidus, (9) 273, 291; (11) 
232 ; (12) 286; (13) 188, 245, 250; (14) 
239; (15) 321, 330, 333 ; (16) 250, 252 ; 
(17) 141, 184, &e. 
Ilyocypris biplicata, (15) 321, 326, 330; 
(16) 252 ; (17) 160, 164, 168, 184. 
gibba, (8) 341, 344; (9) 273, 277, 
282, 283, 286, 288 ; (13) 188; (15) 333. 
Ilyodromus olivacea, (17) 160, 168, 190. 
robertsont, (15) 321, 326; (17) 173, 
190. 
violacea, (17) 161. 
Ilyopsyllus coriaceus, (18) 396. 
Immature fish. See Fish, immature. 
Impoverishment of fishing grounds, neces- 
sity of improved statistics to deter- 
mine, (20) 82, 86. 
of fishing grounds, system of statis- 
tics to determine, (20) 75. 
Inachus dorsettensis, (6) 255; (15) 129; 
(20) 537. 
leptochirus, (20) 510. 
Inadequacy of present limit of territorial 
waters, (12) 12. 
Industrial fishing school, (6) 301. 
Influence of locality on growth, (20) 336. 
of temperature on the development 
of fiskes' eggs, (13) 15, 147. 
Infusorian parasite, (15) 172. 
Injuries to food-fishes, (10) 207, 299. 
Inland waters of Scotland, invertebrate 
fauna of. See Fauna, invertebrate. 
Innervation of free rays in gurnard, (12) 
328. 
Inopsetta, (18) 358. 
Inshore waters, spawning of fish in, (7) 
183. 
Intensity ef fishing, as shown by marked 
fishes re-caught, (15) 375. 
Intercrossing in the genus Salmo, (7) 12. 
Part IIT.—Twenty-third Annual Report 
International conference on fisheries of 
extra-territorial waters, (9) 389. 
Investigation Committee, statistics 
for, (21) 38. 
physical investigations, (15) 280. 
Intraovarian eggs of common dab, (16) 
—— fluid in teleosteans, nature of, (16) 
93. 
Inverness Firth, physical and chemical 
exanination of the water, (6) 313, 318, 
336. 
Invertebrate fauna of inland waters of 
Scotland. See Fauna, invertebrate. 
Investigations made on board steam- 
trawlers, (19) 58; (20) 92; (22) 13; 
(23) 13: 
— —- offshore desirable, (13) 8. 
Iphimedia minuta, (12) 264; (15) 139; 
(22) 257. 
—— obesa, (6) 247; (15) 1389; (16) 170, 
177, 210. 
Iphinoé gracilis, (6) 253. 
—— serrata, (19) 273; (20) 479, 510. 
—— trispinosa, (15) 134 ; (16) 167, 209. 
Ireland, Congested Districts Board of, 
(12) 389. 
—— decline of oyster fishery in, (6) 300. 
—— enquiry on beam-trawling in, (8) 
361; (9) 395. 
-— fisheries of, (6) 300 ; (12) 388. 
—— fishery work in, (9) 394; (10) 331. 
—— instructions in fishery matters in, 
(12) 389. 
—— investigation of marine fauna of 
south-west of, (7) 387. 
—— survey of the fishing grounds on 
south and west coasts of, (9) 394. 
Treneus patersonii, (6) 238. 
Ischyrocerus anguipes, (19) 236, 264. 
—— minutus, (14) 161; (18) 402; (19) 
264. 
Isias clavipes, (17) 251; (18) 384. 
Isle of Man, Fishery Committee of, (13) 
3a0: 
Isle of May, eels of, (12) 295. 
Isocardia cor, (8) 332. 
Isopoda of lochs. See Fauna, inverte- 
brate. 
Italy, fishery work in, (6) 308; (7) 401; 
(8) 375 ; (9) 422; (10) 353. 
-—— as a market for Scottish-cured her- 
rings, (7) 163. 
—— beam-trawling in, (7) 401. 
—_— department of fisheries in, (6) 308. 
— — legal sizes for immature fish in, (8) 
375. 
—— Royal Commission of Fisheries in, 
(6) 14. 
—— statistics of fisheries of, (9) 423. 
—— stocking of lakes and rivers in, (8) 
375. 
Ito, Mr K., (6) 308. 
Ttunella tenwiremis, (15) 151. 
J 
“‘ JacKAL,” H.M.S., (12) 21, 301. 
—— cruise of, in the North Sea, 1888, 
(7) 412. 
