192 
Cytherella beyrichi, (19) 257. 
—— scotica, (19) 257. 
Cytheridea elongata, (6) 248. 
—— lacustris, (9) 272, 273; (13) 188; 
(14) 239 ; (15) 330, 333 ; (17) 140, 164, 
184, 191. 
—— papillosa, (6) 243; (15) 143; (20) 
497, 503. 
—-— punctillata, (7) 317 ; (15) 148; (20) 
503. 
—— subflavescens, (5) 328; (15) 148. 
—— torosa, (9) 288 ; (15) 318. 
Cytherideis subulata, (5) 328; (6) 245; 
(20) 503. 
Cytherois fischeri, (8) 324 ; (16) 264. 
Cytheropteron alatum, (15) 144. 
——angulatum, (5) 328; (7) 318; (15) 
144, 
—-- arcuatum, (16) 264. 
—— cdepressum, (7) 318. 
—— humile, (12) 262; 
oli 
——- inflatwm, (15)-144. 
—-- latissimum, (6) 244; (15) 144; (20) 
497, 511. 
——- multiforum, (8) 321. 
—— nodosum, (6) 244 ; 
—— punctatum, (8) 32 
—— subcircinatum, (7) 
Cytherura acuticostata, (6) 244; (8) 323 ; 
(15) 144. 
——- affinis, (8) 322. 
—— angulata, (6) 244; (15) 144. 
—— bodotria, (8) 322. 
—— cellulosa, (6) 244; (15) 144. 
—— clathrata, (6) 244 ; (16) 264. 
—— cornuta, (8) 322 ; (15) 143. 
—— cuneata, (6) 244. 
—— flavescens, (6) 244. 
—— fulva, (8) 323. 
—— gibba, (8) 322; (9) 288 ; (15) 143. 
—— insolita, (6) 244. 
—— lineata, (8) 322. 
—— mucronata, (8) 323. 
—— nigrescens, (9) 288 ; (15) 144. 
—— producta, (7) 318; (15) 144. 
—— quadrata, (6) 244. 
—— robertsoni, (8) 322. 
—— sarsvi, (8) 323. 
—— sella, (15) 144. 
—— similis, (7) 318; (15) 144 ; (20) 501. 
—— simplex, (8) 323 ; (16) 263. 
—— striata, (6) 244; (15) 144. 
—— undata, (6) 244 ; (15) 144. 
(15) 144; (20) 
D 
Das, common (Plewronectes limanda), (15) 
112 ; (18) 286. 
—— age of, at maturity, (20) 371. 
—— distribution of, (21) 44. 
-—— distribution of adult and immature, 
(8) 170. 
—— distribution of eggs of, (15) 238. 
distribution of post-larve and young 
of, (16) 244. 
—— duration of pelagic stage of, (20) 
361. 
—— eggs of, (7) 304; (8) 285; (16) 91, 
114; (17) 82-84, 93, 96, 104, 106. 
Part IIL.—Twenty-third Annual Report 
Dab, common, eggs of, in Firth of Clyde, 
(15) 250. 
—— eggs of, intraovarian, (16) 96. 
—— egg resembling that of, (11) 2438. 
—-— embryo of, (16) 215. 
—— fecundity of, (9) 205. 
—— food of, (7) 225, 232, 235, 236, 237, 
238, 239, 243, 253, 257; (8) 2380, 235, 
246, 250, 251, 252, 253, 254, 256; (9) 
224, 233, 236, 238, 241 ; (10) 213, 218, 
221, 230; (20) 306, 312, 313, 487, 526. 
—— growth of, (11) 194, 265; (20) 335, 
360, 370. 
—— growth, relative, of females and 
males, (20) 371. 
— — increase in numbers of, (14) 146. 
—— mature and immature, (8) 170. 
—-— migrations of, (11) 187. 
—— minimum size at maturity, (8) 161, 
162, 163. 
—— on deep-water grounds, (21) 45. 
—— parasites of, (18) 150, 167. 
—— post-larval stages of, (7) 307; (16) 
225, 228. 
—— proportion of immature, landed, (22) 
18 
—— proportion of males to females, (8) 
349 
—— relation of length to weight, (22) 
144, 212. 
—— sexual proportions of, (10) 239. 
sizes of, (14) 143. 
—— size at maturity, (10) 238. 
—— size-limit between mature and im- 
mature, (22) 18. 
—— spawning areas of, (7) 189 ; (15) 238; 
(23) 20. 
—— spawning period of, (4) 251; (7) 
189; (10) 234; (15) 238; (17) 98; (20) 
360; (21) 45. 
—— young, date of appearing of, (16) 244, 
—— young, diagnostic characters of, 
(16) 228. 
Dab, lemon (Plewronectes microcephalus), 
(15) 112; (18) 353; (21) 46. 
—_— cross-fertilisation of, with turbot, 
(8) 359. 
—— decrease of, (14) 12, 146. 
—— development of, (9) 327. 
— — distribution of, (21) 46. 
—— distribution of adult and immature, 
(8) 168. 
—~-— distribution of young of, (21) 47. 
—— duration of post-larval stage of, (22) 
271. 
—— dwarf mature specimens, (21) 48. 
—— eggs of, (8) 285; (16) 91, 114, 115; 
(17) 83, 84, 93, 96, 106. 
—— experiments in breeding of, (14) 
151. 
—— fecundity of, (9) 264. 
—— food of, (7) 224, 234, 238, 239, 242 ; 
(8) 280, 234, 249, 250, 252, 258, 255, 
256; (9) 223, 235, 236, 238-241; (10) 
313, 220; (20) 306, 313, 525. 
—— growth of, (11) 195, 271. 
—— hatching experiments with, (16) 219. 
—-— hatching of, (12) 11; (14) 151. 
—— mature and immature, (8) 168. 
—— migrations of, (11) 187 ; (21) 46. 
