90 Prof. M'Intosh's Notes from the 



XI. — Xofes from the St. Andreios ^[arine Laboratori/ [under 

 the Fishery Board for Scotland). — No. XV. By Prof. 

 M'Intosh, M.D., LL.D., F.R.S., &c. 



1. On the Ova and Lavvne of Gadiis virens, L. 



2. On the Ova and Larva of the Turbot (?). 



3. On an Epp: resembling that of Arnofflossics megastovia, Douov. 



4. On Lui)ipe)2us lampetrceformis, Walb. 



«5. On Rhombus {Zeugopterus) norvegicus, Giinther. 



1. On the Ova and Larvce ©/"Gadus virens, L. 



In tlie '■ Tenth Annual Report of the Fishery Board ' * a 

 few remarks were made on the ova of this species, which 

 hitherto had escaped observation, notwithstanding that both 

 adults and young fishes were common off the eastern shores. 

 In the spring of 1892 Mr. Duthie, the energetic Fishery 

 Officer at Lerwick, forwarded a itw unfertilized ova ; but the 

 capsules alone remained on reaching the laboratory, the 

 diameter of the most perfect of these being 1"1430 millim., a 

 size which, it is noteworthy, corresponds very closely with 

 that of the living Qg^, as will subsequently be shown. In 

 the Eleventh Annual Report of the Board t a further note 

 was made, some living eggs having been forwarded to the 

 laboratory from Shetland by Mr. Duthie. As far as possible 

 these were examined and figured by Mr. J. M. Anderson, 

 M.A., B.Sc, during my absence; but their vitality was 

 impaired, and though one or two almost hatched, yet no free 

 larva was seen. 



Various efforts had been made to secure these eggs off the 

 east coast of Scotland by sending a man on board steam-liners 

 and other vessels, and by the examination of the green cod 

 captured by the herring-boats off the Forth. Ripe males were 

 occasionally found, but no ripe females. By various inquiries 

 Dr. Fulton (whose ready help on this and other occasions has 

 greatly aided such work) ascertained that one of the most 

 promising places was Gairloch, Ross-shire; and accordingly 

 a man was sent there in the second week of February. He 

 found that in a single haul of the gill-nets off the mouth of 

 the loch (near the Minch) occasionally as many as 640 green 

 cod, besides cod and other fishes, were secured. Many ripe 

 fishes were at once obtained, and the water in the loch teemed 

 with the ova of this species. The first series of ova, fertilized 

 on the 15th February at 2 P.M., passed through the early 

 stages on this and the 16th, and on the 17th were in the 

 « P. 287. t P. 242. 



