218 STALK-El'ED CRUSTACEA. 



lire devoid of dorsal spines and the gastric region is armed anteriorly with 

 two small teeth in the median line. The specimen was afterwards described 

 and fio-ured witli more detail by G. 0. Sars.* The third and fourth abdomi- 

 nal .set^ments are represented as armed with dorsal teeth, similar to, though 

 shorter than, those of G. hrevispinis, while the gastric region appears unarmed. 

 The specimen was in a bad state of preservation when it reached Professor 

 Sars, and Suhm's figure, which was probably drawn noon after the capture, is 

 presumably correct as far as tlie gastric teeth are concerned. The " Albatross " 

 specimens appear to be specifically distinct from the •' Challenger " species, 

 and may be diagnosed at once by the prominent dentate gastric crest, the 

 small size or even absence of the lower spine of the infero-posterior 

 angle of the carapace, and the great breadth of the antennal scale. The 

 pleura) of the first four abdominal segments are expanded posteriorly into 

 rounded lobes. A deep transverse dorsal fold separates the two dorsal spines 

 of the second segment of the abdomen. 



Wood-Mason describes the dorsal spines of the first abdominal somite of 

 G. brevispinis as subequal. In the "Albatross" specimens the anterior of 

 these spines is at the best only half as long as the posterior one. 



G. hrcmpinis was first obtained in the Bay of Bengal (690-1748 fathoms) 

 by II. M. Indian Marine Survey Steamer " Investigator." 



Family EUCOPIID^. 



EUCOPIA Dana. 



Proc. Acad. Nat. Sci. Pliila., VI. 19, 1852 ; U. S. Explor. Exped., Crustacea, Pt. I., p. 609, 1852. 



Eucopia australis Dana. 



Proc. Acad. Nat. Sci. Pliila., VI. 2S, 1S52 ; U. S. Explor. Exped., Crustacea, Pt. I., p. 609, 1852, Atlas, 



Plate XL. Fig. TO, 1855. 



Station 2627 Hyd. Between 1770 fatlioms and surface, submarine tow- 

 net (bottom, 1832 fathoms). 4 specimens. 



Station 2637 Hyd. Between 700 fathoms and surface, submarine tow- 

 net (bottom, 773 fathoms). 1 specimen. 



Station 3377. 764 fathoms. 1 specimen. 

 " 3406. 5-51 " 1 

 " .3433. 1218 " 1 " 



» Rep. Challenger Scbizopoda, p. 48, Plate VII. Fig. 6-10, 1885. 



