612 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41. 



All the specimens are labeled as having been taken at the surface, 

 and in some of the tubes they are accompanied by copepods, zoese, 

 and other plankton organisms. 



Localities. — Vineyard Sound, surface; U. S. F. C, 1875; U.S.N.M. 

 34890-34894; 20, male and female. 



A'ineyard Sound, surface; U. S. F. C, 1881; U.S.N.M. 34301, 34309, 

 34315, 34316, 44015; many, male and female. 



Woods Hole, surface; U. S. F. C, 1882 and 1885; U.S.N.M. 

 35249, 44016, 44017; 14, male and female, including holotype (44016). 



HETEROCUMA SARSI, var. GRANULATA Miers. 



Heterocuma sarsi, var. granulatn Miers, Proc. Zool. Soc, 1879, p. 58. — Calman, 

 Ann. Mag. Nat. Hist., ser. 8, vol. 6, 1910, p. 614. 



The 15 immature specimens of both sexes show the well-marked 

 ridges of the abdomen characteristic of the variety granulata, but 

 there is considerable variation among them in the degree of granu- 

 lation of the carapace. I can find no evidence, however, on wliich 

 to separate the variety as a distinct species. 



Locality. — Albatross stations 4894 and 4895; off Goto Island, Korea 

 Strait; 95 fathoms; U.S.N.M. 44127, 44128; 15, male and female. 



HETEROCUMA DIOMEDE.^, new species. 



Immature female.^Total length, 14.3 mm. 



Carapace a little more than one-fifth of total length, its vertical 

 height a little more than, and its transverse width about equal to, 



Fig. 6.— Heteeocuma diomede/e, immature female, from the side. 



one-half of its length. On the anterior half of the dorsal surface (on 

 the frontal lobe) is a sharp crest cut into three large teeth; on the 

 posterior half is a pair of tuberculated ridges set close together. 

 The long and narrow ocular lobe reaches quite to the extremity of 

 the pseudorostrum and bears a pigmented eye. The antennal 

 notch is deep and angular. The antero-lateral angle is bluntly 

 pointed and does not extend as far forward as the tip of the pseudo- 

 rostrum. The lower edge is serrated anteriorly. The sides of the 

 carapace are dotted with rather widely spaced rounded tubercles. 



The first free thoracic somite is overlapped at the sides by the 

 second. A pair of dorsal ridges closely approximated on the second 

 somite diverge somewhat on the succeeding somites, and a pair of 



