SEA-FISHERIES LABORATORY. 423 



was only sparsely represented in deeper nets. The same 

 applied — in a modified way — to Pandalus montagui, but 

 with most of the other larvae the reverse was the rule. 

 In consequence the deep nets usually contained a variety 

 of forms, and the surface net an almost pure gathering of 

 Hyas. The same fact has been noticed in the catches now 

 in course of collection (April, 1914), and it is a very 

 common thing when examining living collections to see 

 many little black specks (the colour of Hyas) in a surface 

 netting, which are replaced by red ones (the colour of 

 Eupagurus) in a deeper gathering. 



Eupagurus is one of the most typical and abundant 

 of the deeper forms, and, in fact, is not often seen in a 

 surface gathering. This fact possibly accounts for the 

 difficulty experienced in rearing these larvae in the 

 laboratory. In the statement on Decapod larvae in the 

 1912 Report, I noticed that Eupagurus bernhardus seemed 

 to be almost exclusively present in the spring and its 

 fellow, E. prideauxii, in the autumn. The same - is borne 

 out (as far as the former species is concerned) by the 

 present material, which contains only E. bernhardus, and 

 another Eupagurid, of whose identification I am in doubt. 

 Portunus puber was tolerably common in the surface 

 nettings only, and P. depurator turned up occasionally. 



The following is a list of the Decapod larvae found. 

 That the list is not longer is probably due to the fact that 

 the deeper nets, which are most effective for catching llu^sc 

 larvae, happened to be comparatively seldom applied in the 

 routine of plankton investigations during this particular 

 season . 



Hyas araneus April 7th, 8th, 10th, 11th, 12th, 



14th, 15th, 17th, 1S( I., 

 21st. 



