206 STALK-EYED CRUSTACEA. 



the distal part of the outer, and on the distal, margins. The posterior tho- 

 racic appendages, when stretched forward, reach to the distal end of the 

 antennal scales. There are no exopods on any of the thoracic appendages 

 behind the third maxillipeds. In the median line of the sternum of the first 

 abdominal segment there arises a long, laterally compressed, vertical tooth. 



Length, 112 nun.; carapace, 44.5 mm.; rostrum, 8 mm. 



Station 3358. 555 fathoms. 3 males, 2 fem. 



■ 1 male, 1 fem. 

 ' 3 males, 5 fem. 

 ' 2 males. 



■ 1 fem. 



■ 1 male, 1 fem. 



■ 2 fem. 

 1 male. 



• 1 male. 



■ 27 males, 36 fem. 

 ' 2 males, 3 fein. 



• 1 fem. 



• 1 male, 1 fem. 



■ 1 fem. 

 ' 5 fem. 



• 2 males, 3 fem. 



• 1 male, 1 fem. 

 ' 7 males, 8 fem. 



1 male. 



' 1 male. 



' 3 males, 2 fem. 



' 5 fem. 



In this species the carina on the fifth and sixth abdominal segments 

 terminates posteriorly in a small acute tooth, whereas in the preceding 

 species, B. alius, these segments are destitute of teeth, the posterior margin 

 of the sixth rising to form a peculiar transverse ridge. B. hruMlicnm Bate 

 differs from the present species in having the carapace higher, with more 

 convex infero-lateral borders, the third, fourth, and fifth abdominal segments 

 toothed, the sixth toothless, and in the lack of the tooth or tubercle on the 

 sternum between the first pair of abdominal appendages. B. hartlclti Smith, 

 from the Atlantic side of the continent, resembles B. lanneri in many respects. 



