212 STALK-EYED CRUSTACEA. 



concealed ; the anterior gill of this segment, as well as the two gills on the 

 penultimate somite, is large and conspicuous. 



Length, 65 mm. ; carapace, 21 mm. 



Station 3382. 1793 fathoms. 1 male. 



1 fem. 



2 " 

 1 " 

 1 " 

 1 male. 



I assign this species to S. hisulcatus Wood-Mason with some doubt, as the 

 description of the latter species is not detailed enough to make its identity 

 sure. Wood-Mason's specimens were taken in the Arabian Sea and the Bay 

 of Bengal, 738-840 fathoms. 



There is nothing on the labels to indicate that the specimens from Sta- 

 tions 3382 and 3388 did not come up in the trawl, which had been dragged 

 over a bottom of 1793 and 1168 fathoms; but it should be observed that at 

 Station 3382 a net was towed at a depth of 200 fathoms for fifteen minutes, 

 and then brought open to the surface, and that at Station 3388 the Tanner 

 net was towed at a depth of 400 fathoms, bringing up specimens in its upper 

 part only, w^iich was open all the way from 400 fathoms to the surface. 

 Perhaps the specimens of Serr/estes hisulcatus from these two stations were in 

 reality captured in the tow-nets. 



Sergestes edwardsii Kr. 

 PMe LI., Fig. 1-T. 



Kongel. Danskc Vidensk. Selsk. Skr. 5 Raekke, naturvideiisk. malbem. Afd., IV. 246, 277, Plate IV. Fig. 

 9" -9*, 1859. 



In this species the gastro-hepatic groove is well-nigh obliterated on the 

 dorsal part of the carapace, and the dorsal portion of the cervical furrow, 

 which in some species of Sergestes forms the front boundary of the cardiac 

 area, is obsolete. There is a sharp spine near the antero-latcral margin of 

 the carapace, behind the base of the eye-stalk, and another on the hepatic 

 area. A longitudinal ridge runs from the base of the antenna backward, 

 dividing at the hepatic spine into a superior and an inferior branch. The 

 former forms the upper boundary of the branchial area, the latter courses 

 as a carina along the middle of the branchial region, and fades out before 

 reaching the posterior border of the carapace. The rostrum is cristiform, 



