Length in mm. 81 79 77 75 73 71 69 67 65 



No. 12 2 2 1 4 4 7 8 5 6 10 7 7 10 5 



Length in mm. 63 61 59 57 55 



No. 5 6 5 3 12 1 



If we could take such a large number of these very swift fish in a haul of half an 

 hour, it is evident that the fry of the Poutassou must occur here in enormous quantities. 

 We have even taken adult specimens in June 1905 in the intermediate water layers beyond 

 the IGOO-meter line in hauls with the young-fish trawl towed at a rate of only ca. 2 miles 

 per hour, which also indicates the presence of large quantities of this fish here in the 

 Bay of Biscay over great depths. 



Altogether it appears from our investigations, that Gadus Poutassou occurs and 

 spawns in the Bay of Biscay in large numbers both in the northernmost 

 and the southernmost parts. As this widely distributed fish, which has the greatest 

 distribution from north to south of the gadoids described here, also occurs in the Mediter- 

 ranean, it is evident that it must occur in the Atlantic off the coasts of Portugal as well 

 as in the Bay of Biscay. According to friendly information from Dr. Ad. Cligny of Bou- 

 logne-sur-Mer, Gadus Poutassou is very common in the Bay of Biscay, where it is 

 often taken in quantity by French trawlers. 



11. Gadiculus argenteus Guichenot, Silvery Pout (Chart I) 



§ 1. Remarks on the identification 



I have nothing to add here to what has been said in my monograph on Gadus, 

 Parts I and IL 



The single postanal pigment spot, which is present already in the youngest stages, 

 makes this species very characteristic and readily distinguishable from all other species. 

 All the postlarval and young developmental stages are known , but on the other hand, 

 the eggs have not yet been identified. 



§ 2. General features of the occurrence 



Chart I, where the distribution of the pelagic fry of Gadiculus argenteus is re- 

 presented along with the same stages of the cod (Gadus callarias), applies to the months 

 of April, May and June. P^r July, August and September our stations are not given on 

 the Chart, as pelagic fry of this species were found at extremely few of them, the fry 

 having by that time given up the pelagic mode of life. These few positive stations after 

 June are marked with the sign $ to distinguish them from those before the 1st of July, 

 which are represented by the usual sign (o). 



HoLT^ was the first to show that Gadiculus, which was originally known from more 

 southerly parts of the Atlantic and from the Mediterranean, is a common fish in the 

 Atlantic off the northern parts of West Europe, and he characterises its occurrence there 



' Hoi-T, Survey of Fishing Grounds, W. Coast of Ireland, p. 246—47; 

 also 



Hoi.T and Calderwood , Survey of Fishing Grounds, W. Coast of Ireland, 1890 — 91, Report on the 

 rarer Fishes (Scientific Transact. Royal Dublin Society, vol. V (Ser. II), IX, p. 435 et seq., 1895). 



