134 



a fine median ridge and is armed on either border with three spines — two close 

 together near the base, the third in front of the eyes ; its base is separated from 

 the gastric region by a transverse groove. 



All the crests of the carapace, except the anterior portion of the 3rd or 

 " dorso-lateral," are present and are crenulate or coarsely serrate, but the 

 " dorsal " and the anterior half of the " subdorsal " crests are a good deal lost 

 sight of in the general crisp tuberculation of the dorsum of the carapace. The 

 abdominal terga and pleura are similarly crisply tubercled. 



The anterior half of the " lateral " crest is cut into two small teeth, the 

 anterior of which lies immediately behind the pre-eminently large branchiostegal 

 spine. 



The abdomen is carinated in the middle line exactly as in G. investigatoris. 

 The pleura of the 1st abdominal somite end in a sharp procurved tooth; those of 

 the 2nd and -5th somites have their anterior and posterior angles dentiform on 

 either side of a median spine ; those of the 3rd and 4th somites end each in two 

 recurved spines, of which the anterior is the larger ; those of the 6th somite end 

 in a single large recurved spine. The telson is as in G. investigatoris. 



The eyes are of moderate size their major diameter being contained 4^ times 



in the length of the free portion of the rostrum : in spirit they are of the same 

 colour as the integument. 



The antennular peduncle reaches only to the tip of the antennal scale : the 

 inner flagellum, which is much the more slender and slightly the longer, is about 

 as long as the peduncle. 



The antennal scale is elongate-oval, its length being slightly more than 

 twice its breadth : the antennal flagellum is a little longer than the carapace and 

 rostrum. 



The external maxillipeds are as stout as the 1st pair of legs and do not 

 reach the tip of the antennal scale. 



The 1st pair of legs, with the dactylus extended, reach to the end of the 

 penultimate joint of the external maxillipeds. 



The 2nd pair of legs, which are shorter than the 3 pairs behind them, do 

 not reach the tips of the external maxillipeds. The dactyli of the last 2 pairs of 

 legs spring, as usual, from a brush of setae at the end of the propodites, and 

 have their outer edge produced to form a small incurved claw. 



Colour in life pale pink, eyes dull yellow. 



In the unique specimen the carapace (rostrum included) is 28 millim. long, 

 the abdomen 38 millim. long, measured in the middle line. 

 From the Bay of Bengal, 1748 fathoms. 



Regd. No. ~ (Type of the species). 



