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GLYPHOCKANGON SIC ARIA 



145 



rostrum. 



On the 



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is unarmed with spines, but is broken into two tubercles, the posterior of 

 which is the more prominent. In the trianguLar area between this canna and 

 the gastro-hepatic sulcus are several small tubercles disposed for the most 

 part in single row. The gastric region is free from tubercles in the median 

 line, barring a minute one at the anterior boundary near the base of the 



But on either side, this region is ornamented with tubercles ,^ these 

 are not spinous, nor do they tend to form very well-marked carinae. 

 branchial regions there are three carinas on each side ; the uppermost of these 

 is broken up into five or six tubercles ; the tops of these tubercles, as well as 

 of the other carince on the branchial and the hepatic areas, exhibit a corodcd 

 surface, and a similar appearance is manifest on the whole lower surface of 

 the carapace where it is bent beneath the thorax. 



The abdomen is irregularly bestrewn with low tubercles, which, as com- 

 monly in this genus, take on the form of a low interrupted keel along the 

 median line. The lower margins of the second to the fifth segments are 

 armed with two spines, the posterior of which is the smaller on the second, 

 third, and fourth, but the larger on the fifth segment. The sixth segnient 

 is armed with a single spine on each side, at the postcro-lateral angle. 

 telson is straight and much shorter than the rostrum ; it is furnished with a 

 small laterally compressed tooth in the median dorsal line at the base, and 

 both the dorsal carina) and the lateral margins are obsoletely dentate alon 



their basal half. 



The ey es are rather small, and their pigment is apparently not so dark as 



in most species of this genus. 



The antennal scale is about one half as long as the rostrum, oval, ciliated 

 on the border, but not furnished with any spinules except the small one on 



I 



the outer border. 



The dactyli of the three posterior pairs of legs are lanceolate. 



The posterior pair of abdominal appendages are shorter than the telson ; 

 both the dorsal and ventral faces of these appendages are free from spmes or 



tubercles. 



Length, 124 mm. ; length of rostrum from tip to anterior gastric groove, 

 30.5 mm. ; length of carapace, including rostrum, 58 mm. ; length of telson, 

 20 mm. ; length of antennal scale, 13 mm. ; breadth of antennal scale, 

 7.5 mm. 



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The 



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Station 3382. 1793 fetboms. 2 specimens. 



This species is nearly related to tlie preceding {G. noUUs), 



It differs 



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