OSTRACODA. 



'Discovery' nettings, but in one of these it was plentiful lat. 56 54' S., long. 

 170 28' E. The other stations in which it occurred less abundantly are lat. 49 40' S. 

 long. 172 18'30"E. (surface); lat. 59 19' S., long. 120 24' 30" E. (five fathoms); 

 lat. 58 49' 45" S., long. 154 48' W. (five fathoms); and in Winter Quarters, No. 8 

 hole (ten fathoms). 



The ' Discovery ' specimens differed in all cases from the type in being almost 

 destitute of colour and striation of the shell, and in the absence of marginal 

 serrulations, which are usually very distinct. But, apart from these peculiarities, I 

 cannot find any characters to distinguish them from the type. I propose to give them 

 the varietal name Isevis. 



CYPRIDINA GLACIALIS. 



Shell, seen laterally, ovate, greatest height situated in the middle and equal to 

 about two-thirds of the length ; anterior extremity rounded off, beak short and acutely 



CYPRIDINA GLACIALIS. 



pointed, not at all prominent, subjacent sinus small and shallow, posterior extremity 

 slightly produced below the middle ; dorsal margin boldly and evenly arcuate, ventral 

 much flattened ; seen from above the outline is elongated, ovate, more than twice as 

 long as broad, widest in the middle, tapering gradually toward the anterior extremity, 

 which is subacute, 'posterior extremity produced and mucronate. Substance of the shell 

 thin but calcareous, surface smooth, destitute of markings or sculpture, colour yellowish. 

 Length, 5 mm. 



One specimen only a female was seen in a netting consisting mainly of 

 P/tilomedes assimilis. Winter Quarters, llth Nov., 1902; Hut Point. Its nearest 

 allies seem to be Cypridina yracilis, Brady, and, perhaps, C. luteola, Dana, with neither 

 of which, however, can it be certainly identified. 



