4ss 



THE VOYAGE OF H.M.S. CHALLENGER. 



Habitat.— Station 133, October 11, 1873; lat, 35° 41' S., long. 20° 55' W. ; near 

 Tristan da Cunha; depth, 1900 fathoms; bottom, Globigerina ooze; bottom tempera- 

 ture, 35°"4. One specimen, female ; length 62 mm. Trawled. 



Station 168, July 8, 1874; lat. 40° 28' S., long. 177° 43' E. ; off New Zealand; 

 depth, 1100 fathoms; bottom, blue mud; bottom temperature, 37°'2. Six specimens; 

 three males and three females, one bearing ova; length 35 mm. Trawled. 



Station 184, August 29, 1874; lat, 12° 8' S., long. 145° 10' E.; near Torres Strait; 

 depth, 1400 fathoms; bottom, Globigerina ooze; temperature, 39°"0. One specimen, 

 male. Trawled. 



Station 198, October 20, 1874 ; lat. 2° 55' N., long. 124° 53' E. ; near the Philippine 

 Islands ; depth, 2150 fathoms ; bottom, blue mud ; bottom temperature, 38° "9. Two 

 specimens, females. Trawled. 



The animal is long, slender, and graceful. The rostrum is sharp-pointed, reaches a 

 little beyond the ophthalmopoda, and is flanked by two small teeth. The median line of 

 the carapace is slightly carinated, armed with three spines, two near together on the gastric 

 region, the third halfway between the second and the posterior margin of the carapace, 

 where the carina fades away. On each side, defining the separation of the branchial from 

 the cardiac regions, is another small ridge or carina running continuously from the 

 posterior margin of the carapace to the orbit, it is armed with a single tooth near the 

 middle, anterior to which the carina is faintly marked. Another small tooth, the 

 hepatic, defines the separation of the branchial from the antenna] region. The orbit is 

 deeply excavate, and the frontal margin of the carapace is laterally projected forwards to 

 nearly the same level as the eyes and rostral apex ; it is armed with a tooth at the 

 outer can thus of the orbit, and another at the fronto-lateral angle, just beyond the 

 second pair of antennae. The pleon is smooth, the posterior somite having the sides 

 much compressed. 



The telson is long, narrow, dorsally slightly flattened anteriorly, the sides depressed 



