GLYPHOCRANGON SICARIA. 145 



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

 which is the more prominent. In tlie triangular area between this carina 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 

 rostrum. But on either side, this region is ornamented with tubercles ; these 

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

 branchial regions there are three carinae 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 carinte on the branchial and the hepatic areas, exhibit a coroded 

 surface, and a similar appearance is manifest on the whole lower sui'face 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 segment 

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

 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 carinse and the lateral margins are obsoletely dentate along 

 their basal half. 



The e_yes 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 

 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 spines 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. 



Station 3382. 1793 fathoms. 2 .specimens. 



This species is nearly related to the preceding {G. noUlis). It differs 



