114 Faxon, Lucifer. 



There is no clear line of demarcation between 

 the antennary segment and the carapace. 



Carapace about as long as the first abdominal 

 segment. Its inferior borders crenate. A minute 

 spine on each side. (Figure 1, f.) 



The first five segments of the abdomen are 

 about equal in size, their later o -inferior margins 

 produced into an obtuse angle at the middle. 

 The sixth segment of the abdomen is almost 

 twice as long as the preceding ones, and is fur- 

 nished with two teeth on the lower border on 

 either side ; the anterior tooth is pointed ; the 

 posterior, blunt. 



The eye-stalks are clavate, and less than one- 

 half as long as the antennary segment. 



The peduncle of the first antennae is composed 

 of a basal segment nearly equal in length to the 

 ocular peduncle, and two short segments. The 

 proximal end of the basal segment is slightly 

 enlarged for the accommodation of the auditory 

 sac with its enclosed otolith. (Figure 1, e.) (Note 

 2.) The peduncle bears a long multiarticulate 

 flagellum, the proximal annuli of which are fur- 

 nished with short setae. 



The peduncle of the second antennae is com- 

 posed of two segments. Of these, the first is 

 very short, and bears a short "olfactory denti- 

 cle." The second segment is much longer, but 

 not equal to the proximal segment of the first 



