24 



A. E. HEFFOKD. 



I. (Z. norvegicun). 



Diameter 



II. Z. punctatus (? all this species) 

 Diameter 



Date. 



of eg? 



of oil-globule. 



Date. 



of egg. of oil-globule. 



I have not the slightest doubt in referring all the eggs of Column I 

 to Z. norvcgicus. It will be noted by reference to Table I that the 

 localities of their capture belonged in general more to the open-sea 

 waters than is the case for the larger eggs of Column II. Most, if not 

 all, of the latter I ascribe to Z. imnctatus. Not only do the dimensions 

 of the egg and oil-globule fall into two fairly distinct groups, but also, 

 as far as could be observed, the hatched- out larvae from the smaller 

 eggs exhibited one type of characteristic pigmentation (identified by 

 Ehrenbaum, op. cit., with Z. norvcgicus), and those from the larger eggs 

 another type of pigmentation, which is identical with that shown by 

 Holt's " Species X"(llb, Figs. 20 and 21), referred by Ehrenbaum, 

 with a query, to Z. punctatus. I do not doubt but that this is its 

 species. There is only one other species possible and that is Z. uni- 

 maculatus, a much less common fish in our area. Moreover, the latter 

 has not occurred in our collections of post-larval fishes for the years 

 1906, 1908, and 1909, although Z. norvegicus is common and Z. punctatus 



