204 
Fishes, young, of Moray Firth, (8) 287 ; 
(9) 340; (10) 304; (11) 254 ; (13) 268, 
270; (14) 224; (15) 255. 
of St. Andrews Bay, (8) 286, 
287 ; (11) 263; (12) 299, 301; (13) 260, 
261, 264 ; (14) 225. 
—— —— on deep-water grounds, (19) 
189. 
Fishing, capture of immature fish by 
various methods of, (8) 179. 
gear, amount of, (10) 179. 
grounds, extension of, (10) 188. 
method of ascertaining produc- 
tiveness of, (21) 38. 
ot Firth of Clyde, (6) 5. 
—— —— of Stonehaven district, (6) 222. 
on the east coast of Scotland, 
(9) 11, 177. 
Five-bearded rockling. 
five-bearded. 
Flat fishes, arrangement of muscles in, (4) 
168. 
classification of, (18) 335. 
— comparison of nasal organ in, (18) 
338. 
— decrease in supply of, (11) 9, 10, 11, 
12, 24, 27; (12) 9, 384. 
—— decrease of, in closed areas, (14) 12, 
146. 
—— diagnostic characters of, (13) 333. 
—— diminution of, (10) 8. 
—— fluctuations in abundance of, (14) 
136, 138. 
—— geographical distribution of sub- 
families of, (18) 362. 
growth of, compared with round 
fishes, (20) 334. 
landed by trawlers at Aberdeen, 
(20) 77. 
—— mature and immature, (8) 166. 
—— most important characters in classi- 
fication, (18) 348. 
numbers and sexes of, (8) 348. 
—— olfactory organ of, (18) 338, 349, 
363. 
—— origin of, (18) 362. 
probable migratory movements in 
winter, (6) 8. 
proportion caught by trawlers which 
are marketable, (22) 15. 
proportion of immature, landed by 
trawlers, (22) 16. 
rearing experiments with, (16) 219. 
—-— relative importance of external 
characters of, (18) 335. 
relative quantities caught by line 
fishermen and beam-trawlers, (6) 7. 
size of mouth in, as a character in 
classification, (18) 336. 
spawning of, (8) 260. See Spawning. 
value of hypural elements of, in 
classification, (18) 346. 
—— value of pectoral arch and ventral 
fins in classification of, (18) 340. 
value of sinistral or dextral 
character, (18) 336. 
variability in asymmetry of, (18) 363. 
vertebral column and alimentary 
canal of, in regard to classification, 
(18) 343. 
See Rockling, 
Part IIIT.—Twenty-third Annual Report 
Flemingia zetlandica, (15) 120. 
Fletcher, Mr J., (23) 156. 
Flounder (Pleuronectes flesus), (18) 286. 
cross-fertilisation of, with lump- 
sucker, (8) 358. 
date of appearance of young, in 
harbours, (16) 246. 
—— digestibility of, (5) 228. 
—— distribution of, (21) 42. 
distribution of eggs of, (15) 231. 
eggs of, (2) 47 ; (7) 304 ; (8) 285 ; (16) 
91. 114; (17) 82-84, 93, 96, 104, 106. 
—— eggs of, in Firth of Clyde, (15) 250. 
—— fecundity of, (9) 265. 
—— fishing in Solway, (7) 175. 
—— food of, (7) 226, 234, 240; (8) 231, 
238, 249, 250; (9) 227, 235, 238; (10) 
215, 223 ; (20) 487, 527. 
—— growth of, (9) 391. 
~-—-— growth of, in tanks, (7) 405. 
in Loch Fyne, (15) 112; (18) 353. 
-—— mature and immature, (8) 172. 
—— migrations of, (21) 42. 
-—— minimum size at maturity, (8) 161, 
162, 163. 
multiple tumours in, (3) 66 ; (4) 214. 
—— parasites of, (18) 150; (19) 121 ; (23) 
108 
—— post-larval stages of, (16) 225, 236. 
—— proportion of males to females, (8) 
348, 349 ; (10) 239. 
relation of length to weight, (22) 
144, 214. 
sexual proportions of, (10) 237. 
-—— sinistral and dextral forms of, (7) 
326 ; (18) 363. 
size at maturity, (10) 238. 
—— spawning areas of, (7) 190; (8) 263 ; 
(15) 232 ; (21) 43; (23) 20. 
—— spawning period of, (4) 251; ( 
190; (8) 263; (10) 234; (15) 232; (1 
98 ; (21) 43. 
Fluctuations in the abundance of the 
food fishes, (14) 134. 
Fluke, sail. See Megrim. 
Flying-fish (Hxocetus volitans), (18) 288. 
Food, diatoms as, (16) 244. 
fishes, classification of marketable, 
by trawlers, (21) 40. 
—— —— development of, (8) 15; (13) 
14, 220; (14) 15, 171. 
—_— development and _ life-history 
of, (6) 265; (9) 317. 
—— —— distribution of, (21) 38, 40. 
—— effects of closure of waters on 
size of, (14) 142. 
—— —— eggs of, (14) 223. 
—-— —— fluctuations in abundance of, 
(14) 134. 
—— —— general remarks on post-larval 
forms, (6) 269. 
—— —— habits of young of, (4) 214. 
——\ —— hatched at Dunbar, (13) 8, 9, 
7) 
7) 
123. 
—— —— hatching and rearing of, (13) 
8, 123. 
—— —— hatching of, (14) 8, 150; (15) 
10. 
—— —— life-histories of, (14) 15, 171. 
—— —— migrations of, (21) 40. 
