Boone, Crustacea, Cruise of "Alva," 1931 117 



the proximal margin ; the second pair being about halfway the 

 telsonic length ; the third pair being halfway between the second 

 pair and the telsonic distal margin. The telson teiTninates in a shal- 

 low triangulation armed with a submedian pair of elongate, acumi- 

 nate spines, a few long bristles and an outer pair of small, articu- 

 late spines, one each being at the outer distal lateral angle of the 

 telson, these spines being in line with those of the dorsal series. 

 The uropoda have the inner blade quite narrow throughout its 

 length, and distally the lateral margins converge to a narrowed, 

 slightly rounded apex. The outer blade is somewhat wider and 

 a little longer than the inner one, with its outer lateral margin 

 definitely thickened, defined on the inner side by an oblique carina 

 and terminating in an acute, subdistal spine; a curved transverse 

 suture extends inward opposite this tooth ; the inner distal portion 

 of the blade is rather regularly convex ; both blades are ciliated. 



The eye is quite large, set upon a short obconic stalk which has 

 less depth than the large hemispherical black cornea, which bears 

 an ocellus adjacent to the dorsal margin and has a diameter equal 

 to one-third of the length of the carapace. 



The antennular peduncle is only one-third as long as the ros- 

 trum, or scarcely three-fourths as long as the antennal scapho- 

 cerite ; the first article is not quite as long as the second and third 

 articles considered together, with the stylocerite and distal spine 

 small ; the second article is a trifle shorter than the third ; the outer 

 flagellum is deeply cleft, the inner branch slenderer, both are one 

 and one-half times as long as the rostrum. 



The antennae have the basicerite armed with a small spine; 

 the scaphocerite not quite one-half as long as the rostrum, its 

 median width nearly half its length, slightly outcurved, with the 

 lateral margin slightly convergent, the outer one terminating in 

 a subdistal spine. The distal margin of the major or inner por- 

 tion of the blade is curiously bluntly truncate. The carpocerite is 

 cylindrical, extending nearly halfway the length of the scapho- 

 cerite ; the flagellum is broken off. 



The third maxillipeds extend not quite as far forward as does 

 the rostrum and are slender, subcylindrical, yet much stouter than 

 the first pair of legs and with the distal article armed along its 

 inferior side with a series of sharp spinules, interspersed with 

 setae; on the distal margin these spines are clustered and much 

 stronger and curved. 



