io8 



Stat. 189'. September 12. Lat. 2°22'S., long. I26°46' E. Tovvnet. Some young specimens. 

 Stat. 203. September 19. Lat. f 2i~' -S S-, long. 124° 15'.$ E. Hensen vertical net, from 1500 m. 



to surface. 6 specimens (1 adult cf, 4 adult 9> i immature cT)- 

 Stat. 220. November 1/3. Anchorage off Pasir Pandjang, West coast of Binongka. 278 m. 



Townet. 23 very small specimens. 

 Stat. 230. November 14. Lat. 3°58'S., long. i28°2o'E. Hensen vertical net, from 2000 m. 



to surface. 2 immature specimens. 

 Stat. 243. December 2. Lat. 4°3o'.2S., long. I29°25'E. Hensen vertical net, from 1000 m. 



to surface. 3 specimens (i adult 9j 2 immature specimens). 

 Stat. 276. January 9. Lat. 6^47'. 5 S., long. I28°40'.5 E. Hensen vertical net, from 750 m. 



to surface. 3 immature specimens (2 very small). 



Adult Specimens (figs. 2a — 2//). — To the description given by Sars some points 

 may be added (see besides "Remarks"). In tlie adult female the carapace has no lateral denticle, 

 and the frontal plate is somewhat short (fig. 2 c) while the rostrum is long or very long, acute, 

 varying- considerably in breadth, being sometimes less than twice as long as broad and badly 

 defined from the plate, sometimes somewhat or much narrower, until four or five times as long 

 as broad and then better defined. In the adult male the carapace has preserved the lateral 

 denticle found in all immature specimens; the frontal plate is short, and the rostrum a quite 

 small, triangular plate broader than long (fig. 2 «) or, and most frequently, moderately small, 

 very oblong-triangular, reaching rather little beyond the front margin of the ocular segment 

 (fig. 2d). The eyes are moderately large, with the lower section as large as, or a little larger 

 than, the upper. The antennulse in the male — as in all species of the genus — with the two 

 distal peduncular joints much thicker, besides the second joint somewhat shorter and the third 

 much shorter, than in the female; furthermore the basal joint of the lower male flagellum much 

 thickened and furnished with sensory setae, but the proximal part of the same flagellum is 

 straight. Terminal joint of the elongated legs (fig. 2d) three times as long as broad; its longest 

 spine scarcely serrated along a distal part of its posterior margin (fig. 2e). Anal process in the 

 male a simple spine, in the female with a small accessory spine or more rarely two such spines 

 from its basal part behind the principal spine. 



The copulatory organs afford important characters (figs. 2/ — 2/1). The spine-shaped process 

 (ficr. 2/, /'.) is unusually long, somewhat or even considerably longer than the terminal jjrocess 

 (/-.) and only somewhat shorter than the pro.ximal process (/''.), which always is considerably 

 lono-er than the terminal, rather thick and straight or a little curved with the end broadly 

 obtuse and no teeth on the distal part of its outer margin. The lateral process (/'.) is shaped 

 al)0ut as the proximal, but much or very much shorter, varying considerably in length. 



Length of the male 14.5 — 16 mm., of the female 18 — 20 mm. 



Very young Specimens. — Figs. 21 and 2/', drawn with the same degree of 

 enlargement, show the front part of two such specimens measuring respectively 6.7 and 4.7 mm. 

 in length. The frontal plate and rostrum constitute together a large, broad, triangular plate 

 proportionately much larger than in the adult female. In the adults the elevated part of the 

 carina containing the dorsal organ is quite short and e.xtremely low; in the very small specimen 

 shown in fig. 2 /' this part is an extremely conspicuous, rather large and high crest with the 

 front margin almost vertical and rounded above, while in the somewhat larger specimen shown 



