230 Part LII.—Twenty-third Annual Report 
Plaice, eggs of, change of volume during | Plaice on Fisher Bank, (21) 41. 
maturation, (16) 141. parasites of, (18) 150, 163, 164; (19) 
eggs, distribution of, (15) 229. 121 ; (23) 108. 
distribution of, in Firth of | —— peculiarly coloured, (13) 234. 
Clyde, (15) 248. percentage of mar ed, recovered, 
retention of, byfemale, (18) 330. (15) 375. 
in small, period of greatest growth of, (17) 
(20) 356. 239. 
embryo of, (16) 215. post-larval stages of, (16) 225, 228. 
fecundity of, (9) 263. — proportion of males to females, (8) 
food of, (7) 223, 231, 236, 237, 288,/ 348, 349; (20) 357. 
239, 241, 252; (8 ) 230, 232, 245, 249, Wee proportion z immature, landed by 
250, 251, 252, "953. O58, 256 ; 51 1(9), 222, 
233, 236, 237, 239, 240, 241; (10) 212, 
217, 219, 229 ; (20) 306, 487, te 
—— food of post-larve, (15) 180; (16) 
224. 223. 
— food of small, (20) 524. relation of distribution of, to depth 
—— growth, rate of, (11) 192; (13) 289; of water, (20) 347, 352. 
(17) 2325) (20) S84, 337-3) (2: 3) 125, 133. relation of length to weight, (22) 
growth of, in Solway Firth, (20) 346. 144, 145, 205, 240. 
growth of, on East Coast, (20) 347. relation of spawning period of, to 
growth, comparative, at Dunbar temperature, (15) 248. 
and in Denmark, (17) 246. relation of temperature to growth of, 
growth, comparative, of females (20) 342. 
and males, (20) 356. relation of temperature to spawning 
growth of small, arrested in winter, } of, (20) 344. 
(20) 342. reversed action of gill-cover in, (22) 
hatching of eggs of, (12) 10; (13); 287. 
9, 123 5 (14) 152°; (16) 220; (17) 205; sexual proportions of, (10) 239. 
(18) 330; (21) 180; (22) 262. size and age of, at maturity, (17) 246. 
immature, abundance of, in shallow size-limit between mature and im- 
water, (22) 28. mature, (22) 18. 
non-migratory, (8) 168. size-limits, various, proposed, (18) 
—— at Grimsby, (12) 386. 190. 
landed at Grimsby, (13) 332. size of, on deep-water grounds, (21) 
large hauls of, (20) 107. 
larve of, (12) 168, 215. sizes, maximum, of maleand females, 
larval and post-larval stages of, (15) (20) 357. 
trawlers, (22) 1 
quantity of srl taken in shallow 
water by otter trawl, (22) 28. 
—— rearing of post-larval, (15) 14; (16) 
175. sizes of, (14) 143. 
—— lines of growth in otiliths of, (23) small, difficulty of preserving, alive 
126, 133: on trawlers, (20) 107. 
—_. -—-__ jn seales of, (23) 125. spawning of, influence of change of 
—— mature and immature, (8) 166. temperature on, in confinement, (20) 
maturity, minimum size at, (8) 161, 441. 
162, 163. spawning grounds of, (8) 259; (15) 
maturity, average size at, (18) 190;| 2380; (23) 20. 
(22) 156. — spawning period of, (4) 250; (7) 
maturity, average size at, in north- 171, 187 ; (8) 260; (10) 234; (15) 230; 
ern North Sea, (18) 199. (17) 97; (20) 338. 
maturity, average size at, in North spawning period, duration of, in 
Sea, Kattegat, and Baltic, (18) 199. large tank at hatchery, (22) 262. 
maturity, average size at, in south- special distribution of young, on 
ern North Sea, (18) 197. beach, (17) 235. 
maturity, size at, (10) 238 ; (20) 357. stage at which larvee begin feeding, 
maturity, size at, in different regions, (16) 224. 
(20) 358. tenacity of life in, (23) 252. 
measurements of young, (17) 236. variability of, (18) 201. 
migrations of, (7) 406; (11) 179; |—— varieties of, (20) 336. 
(15) 375; (21) 40. —— young, caught in bag-net fishing, 
migrations of, experiments on, (9) (23) 157. 
412. Plankton in fresh-water lochs, distribu- 
—— migrations of, extent of, (21) 42. tion of, (17) 133. 
—— migrations of, in relation to matur- of Forth, (16) 155. 
ity, (8) 168. method of collecting, (15) 212. 
movement of, in inshore waters, (11) notes on animal, collected by H.M.S. 
16, 185. “* Research,” (15) 305. 
—— movement, rate of, (21) 42. —— plant, (15) 212. 
— multiple tumours in, (3) 66; (4) 214. didymus-, characters of, (15) 302 
— mutilated specimen of, (21) 229. —— phyto-, report on, (15) 297. 
