522 



THE VOYAGE OF H.M.S. CHALLENGED 



The pleon has the surface much more tuberculated than the carapace, and more so 

 than the lithographic artist has shown in the plate. The telson is long and well 

 developed, being quite half the length of the pleon. 



Glyphocrangon acuminata, n. sp. (PI. XCIV. figs. 2, 3). 



Rostrum nearly as long as the carapace ; median carina on the anterior extremity 

 elevated above the lateral margins, extending nearly to the frontal region, and armed on 

 each side with two strong teeth. Carapace smooth, excepting the dorsal carina?, which 

 are slightly tuberculated. Frontal margin armed on each side with two large teeth, and 

 the hepatic region bearing one small tooth. 



Pleon having the teeth on the dorsal median line reduced to very slight elevations, 

 most conspicuous on the posterior somites. 



Telson slightly longer than the lateral plates of the rhipidura. 



Habitat— Station 175, August 12, 1874 ; lat. 19° 2' S., long. 177° 10' E. ; near the 

 Fiji Islands ; depth, 1350 fathoms; bottom, Globigerina ooze ; bottom temperature, 36°. 

 Twenty-two specimens ; six males, five well-developed females bearing ova, and eleven 

 others, either small males or immature females. Trawled. 



This species corresponds with Glyjjhocrangon nobilis, A. Milne-Edwards, which 

 was taken at a depth of 1131 fathoms off the Island of Dominica in the West 

 Indies. They correspond in the form and length of the rostrum, in the length and up- 

 ward curve of the telson, particularly in the male, but in (Jlyphocrangon nobilis the 

 surface of the carapace and pleon is covered with a number of " rugose prominences," 

 whereas in the specimens from Fiji the whole of the surface of the carapace is smooth, 

 excepting the dorsal carina?, which are slightly tuberculated, as well as the outer or 

 second carina, and the general surface of the gastric region, there being a small but 



