Contents. 3 
PAGI 
IV. Report on the Operations at the Marine Fish Hatchery, Bay of 
Nigg, Aberdeen. By T. Weinyss Fulton, M.D., F.R.S E., 
Scientific Superintendent. (Plates VI.-VIT.), : < 108 
VY. On the Specitic Characters of Gadus luscus, Gadus minutus, and 
Gadus esmarkii. By H. Chas. Williamson, M.A., D.Sc. 
(Plates VIII.-X.),  . c : : se) LG 
Introduction, . ‘ . . 2 LG 
List of Body, Dimensions, ‘ ; : a 
List of Enumeration Characters, ; cee 
Discussion of the Averages, —. ; ; 2, «iat 
The Numbers of Fin-Rays, ; ; : »* 126 
The Numbers of Vertebree, : J lize 
The Reproduction of the Three Species, ss, 2La0 
The Skulls of the Three Species, ie Loe 
General Comparison between the Three Species, . dae 
A Specific Description, . 135 
VI. On the Tay Sprat Fishery, 1905-1906. By John Fletcher, . 159 
VII. On the Spawning of the Lumpsucker (Cyclopterus lwmpus) and 
the Paternal Guardianship of the Eggs. By T. Wemyss 
Fulton, M.D., F.R.S.E. (Plate XI.) . : ie RGD 
VIII. On the Rate of Growth of Fishes. By T. Wemyss Fulton, 
M.D., F.R.S.E. (Plates XIT., XITI. 1), } rea 
Introduction, . : : ae hiS 
Species dealt with, 3 : : tom S18 
Methods, . : soo £80 
Comparison between Different Species, : etic |. 
Influence of External Conditions, *) ASt 
A Law of Growth, . : ie orae i: ese 
Plaice (Plewronectes platessa),  . : 21t E84 
Common Dab (P. limanda),  . : : my sets 
Flounder (P. flesus), —. ; ‘ cite ics! 
Lemon Dab (P. microcephalus), sy. 6 192 
Long Rough Dab (Drepanopsetta platessoides), . pees 
Turbot (Rhombus (Bothus) maa ee) A ‘ ~~ 199 
Brill (Rhombus levis), . ; . 205 
Cod (Gadus callarias), . ; : ; . 209 
Haddock (G. ceglefinus), ie) 226 
eae (G. merlangus), : ; » 229 
Grey Gurnard (Trigla gurnard: us), J ; sy oe 
Tables of Measurements, I.-XXV.,_. : . 243 
_x. Notes on New and Rare Copepoda from the Scottish Seas. i: 
Thomas Scott, LL. D., CF. L, S. PSF ge ae ), ‘ 275 
X. On the Spawning and Fecundity of the Plaice (Plewronectes 
platessa). By T. Wemyss Fulton, M.D., F.R.S.E., 
Superintendent of Scientific Investigations, ; 281 
XI. On Two Cases of Hermaphroditism in the Cod (Gadus callarias). 
By H. Charles Williamson, M.A., D.Se., Marine Labor avery, 
Aberdeen, (Plates XV., XVI ), ; 290 
