G ^Ics?rs. E. W. L. Holt and W. ^I. Tattersall on 



tliese forms in the upper strata. In the work of tlie ' Helga^ 

 the only net which has been found really efficient for their 

 capture at or near the surface, even at night, has an opening 

 of about 16 square feet (about eight times that of an ordinary 

 ring tow-net), with a mesh of mosquito-netting or the largest 

 size of grit-gauze, Avhich permits of hauling at a speed 

 which would burst fine bolting-silk. 



The details of each haul in which Schizopods occurred, 

 together witli the total number and size of the examples 

 taken, are set forth in the table (pp. 4-5). 



Euphausia pellucida, Dana. 



Tliis species occurred in twenty-five out of thirty hauls 

 in which Schizopods were taken. None of the specimens 

 reached the full size of the species. The ' Oceana ' collections 

 first demonstrated the existence of E. pellucida in British 

 waters. E. bidentaia, Sars, is probably the name most 

 strictly applicable to the North Atlantic form of ^./>e///^67V/a. 



Meganyctiphanes norvegtca (M. Sars), 



Only two specimens of this rather common form were 

 taken by the 'Oceana.^ 'fiiey occurred in net 2y fishing 

 from 650 fathoms to the surface. Station 2 was the station 

 neaiest laud, and the absence of this species from the hauls 

 at the more westerly stations suggests that the latter were 

 beyond the most seaward limit of its distribution at the time. 

 It is, however, an active form which might well avoid small 

 tow-nets. 



"We have found this species common oft* the west coast of 

 Ireland. 



Thysanoessa longicaudata (Kroyer). 



Synon. T. tenera, C4. 0. Sars. 



This was by far the most abundant Schizopod taken by 

 the 'Oceana' in point of numbers, though in tl e number of 

 hauls in which it occurred it is surpassed by both Euphausia 

 pellucida and Stylocheiroi Svhmii. All the specimens 

 Avcre n.ore or less badly damaged, and out of a total of 150 

 not one had a perfect leg of any kind left. It occurred in 

 twenty out of thirty hauls, fishing from 500-1770 fathoms 

 to the surface. 



