- 51 



JüHS. SCHMIDT 



great numbers in llie nüiglibourhood of ilie coasts, iintlor similar conditions to those unior 

 which the young bottom stages of the cod and coallisli live in more northerly waters. In 

 this region these two species are so to speak replaced by G. poUachius, and in all the 

 Plymouth collections which contain hundreds of Gadiis poUachius I have only seen one 

 cod and no coalfish. 



In conclusion, it appears from the data, that the fry of Gadtis polUichins occur in 

 great quantities in the Channel where this species undoubtedly spawns 

 on a large scale, especially in the western part. 



6. Bay of Biscay 

 Chart 1] shows that in the beginning of May we have taken the pelagic young 

 of Gadus poUachius both in the northern part of the Bay of Biscay (just south of 

 Brittany) and in the most southerly part on the north coast of Spain. The numbers taken 

 were certainly small, not more than a single specimen per haul, but we only had a few 

 stations in shallow water within the 200-meter line, where G. poUachius occurs. The 

 young bottom stages we have not had the opportunity to take in the Bay of Biscay, where 

 the pollack according to available information (e. g. Moreah 1. c. p. 242) is an extremely 

 common fish. I may add that I saw this species on the fish market at San Sebastian 

 (near the Franco- Spanish frontier) in the first half of May 1906, when the specimens 

 examined by me were spent. 



5. 



Gadus œglefiiuis Linné, Haddock (Charts III and X) 



§ 1. Remarks on the identification 



The haddock offers no difficulty in diagnostic regards. The eggs are easy to distinguish 

 on hatching, and all the postlarval stages are likewise easily distinguished ^ For the sake 

 of completeness, however, I may give the number of vertebrae I have found in adult had- 

 dock, in case it should be necessary to control a determination of the fry by counting 

 the vertebrae. 



Number of vertebrœ in Gadus œglefinus from Iceland 



§ 2. General features of the occurrence 



On Chart III showing the distribution of the pelagic haddock young, only the 

 stations for April, May and June are included; after this period the haoaock fry have 



1 From the whiting (G. merlangus), with which species it might he confused in the early postlarval 

 stages, it can be distingaiished most easily by, in addition to the form, the absence of preanal ventral 

 pigment, by the early development of the ven trais and by the early pigmentation on these and ou the 

 unpaired fius, 



7* 



