I02 



Stat. 185. September 12. Lat. 3° 20' S., long. I27°22'.9E. Hensen vertical net, from 1536 m. 



to surface. About 25 specimens, of every size. 

 Stat. 189'. September 12. Lat. 2°22'S., long. 126° 46' R. Townet. 3 small specimens. 

 Stat. 194 — 197. September 15. Lat. i°53'.5 S., long. 126° 39' E. — lat. i°45'.3 S., long. 127° 8'. 3 E. 



Plankton, i specimen. 

 Stat. 203. September 19. Lat. 3°32'.5 S., long. 124° 15'. 5 E. Hensen vertical net, from 1500 m. 



to surface. Large quantity of specimens, adults and more than half-grown. 

 Stat. 205. September 20/21. Buton-strait. Surface. 2 specimens (i young, i larva). 

 Stat. 225. November 8. 5700 M. N. 279° E. from Southpoint of South-Lucipara-island. Horizontal 



cylinder. 8 specimens. 

 Stat. 243. December 2. Lat. 4°3o'.2S., long. I29°25'E. Hensen vertical net, from looo m. 



to surface, i specimen. 



Description. — Moderately .slender. The frontal plate (fig. 717) is a low triangle, 

 terminating in a small, regularly or oblong-triangular, very acute rostrum at most about half 

 as long as the breadth of second antennular joint. The carapace with the keel on the gastric 

 area somewhat high at the middle, but not really angular ; the lateral margin with a denticle 

 behind the middle. Eyes somewhat large, black, with a peculiar dark-greyish or dark greyish- 

 bluish tint. First antennular joint without vestige of any leaflet or tooth at the distal upper 

 end; second joint without any distal protuberance or produced angle; second and third joints 

 together scarcely as long as the first joint. Third abdominal segment dorsally with a short, 

 slender, a little compressed, scarcely curved, acute process (figs, yd and 7^); the following 

 segments unarmed. .Sixth segment slender and twice or a little more than twice as long as 

 deep; the anal spine simple and curved in both sexes. Rami of the uropods subequal in length 

 and a little shorter than the telson. 



The copulatory organs (fig. yd) .show several points of interest. The terminal process 

 is of very moderate length, thick at the base, tapering to the acute end and with the terminal 

 part somewhat curved ; the foot is not long, and the heel moderately long, somewhat curved. 

 The proximal process is rather far from reaching the end of the terminal process; somewhat 

 less than the proximal half is rather thick and considerably curved, with the outer margin very 

 convex; then the process becomes somewhat more narrow, but is soon again thickened, being 

 somewhat beyond the middle as broad as a little from the base ; its distal third tapers first 

 feebly and the short terminal part tapers rapidly to the acute end and is bent somewhat inwards. 

 The median lobe is of middle breadth and tapers feebly to the rounded end ; the lateral process, 

 which is placed at the middle of the inner margin, is medium-sized, hook-shaped, being very 

 strongly curved much beyond the middle, with an oblong, acute tooth on the outer margin at 

 the top of the curvature. The setiferous lobe is broad, with the terminal margin angularly bent 

 and bearing 5 setae; besides two somewhat short setse on the outer margin of the lobe and 

 the main plate. 



Length 8 — 8.5 mm. 



Half- grown Specimens and Larvae. — As already stated, the adults have a 

 somewhat high but not really angular keel on the gastric area. In half-grown specimens this 

 keel has an elevated part shaped as a low triangle four or three times as long as high and 

 placed a little nearer to the end of rostrum than to the posterior cephalothoracic margin. In 



