i iS 



terminal margin. The proximal process about as long, but not quite as broad at the base, 

 as the terminal, a little sinuate, with the distal half of the inner margin somewhat convex, of 

 the outer feebly concave, while the end at the outer side is produced into a small, oblong 

 process. The lateral process originates near the proximal and is slightly shorter and somewhat 

 narrower, being narrower at the middle than towards both ends, at the distal end broadly 

 rounded on the inner side, while the terminal outer corner is nearly rectangular. 



Length of the male 5.5 mm., of the female 6.4 mm. 



Remarks. This small species is easily separated from the other forms of the 



/ongüome-group by its small eyes with only two facets on the upper end. The relative length 

 of the distal peduncular joints in the female antennulse, of the antennal squama in both sexes 

 and the shape of sixth abdominal segment show other differences of specific value. 



Distribution. — Specimens from the Pacific are to hand, while the species seems 

 to be wanting in the Atlantic. 



22. Stylocheiron affhic n. sp. PI. XVI, figs. ^a — \d. 



Stat. 66. May 7/8. Bank between islands of Bahuluwang and Tambolungan, South of Saleyer. 



8- — 10 m. Plankton. 31 specimens, most of them immature. 

 Stat. 118. July 13. Lat. i°38'N., long. I24°28'.2E. HENSEN vertical net, from 900111. to 



surface. 1 specimen. 

 Stat. 1 29. July 22/23. Anchorage off Kawio- and Kamboling-islands, Karkaralong-group. 23 — 3 1 m. 



Townet. 3 specimens. 

 Stat. 141. August 5. Lat. i°o'.4S., long. I27°25'.3E. 1950 m. HENSEN vertical net, from 



1500 m. to surface. 8 specimens. 

 Stat. 143. August 7. Lat. I°4'.5 S., long. I27°52'.6E. 1454 m. HENSEN vertical net, from 



1000 m. to surface. 4 specimens. 

 Stat. 148. August 10. Lat. o° 1/.6 S., long. I29°I4'.SE. 1855 m. HENSEN vertical net, from 



1000 m. to surface. 6 specimens. 

 Stat. 157. August 15/16. Lat. o°32'.9 S., long. I30°i4'.6 E. 45 m. Townet. 1 immature 



specimen. 

 Stat. 185. September 12. Lat. 3°2o'S., long. I27°22'.9E. HENSEN vertical net, from 1536 m. 



to surface. 12 specimens. 

 Stat. 203. September 19. Lat. 3 32'. 5 S., long. I24°i5'.5 E. Hensen vertical net, from i50om. 



to surface. 35 specimens. 

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



Townet. 29 specimens, most of them immature. 

 Stat. 276. January 9. Lat. 6°47'.5 S., long. i28°4o'.5 E. HENSEN vertical net, from 750 m. 



to surface. 19 specimens. 



Description. Frontal plate rather long, in the adult females ahvays terminating 



in a long or very long, distally very slender rostrum, while the rostrum is short or very short 

 in the adult males. The dorsal keel on the gastric area moderately high, anteriorly very sloping. 

 The eyes are conspicuously lower than in S. longicorne, less than twice as high as broacl, 

 somewhat pyriform, with the lower section from more than half as broad again to more than 

 twice as broacl as the upper part, in which, seen from the side, 4 or 5, rarely 6, crystal cones 

 are plainly observed; the lower, broad section is clark brown. The antennulse in the female 

 nearly as in 5". longicorne, but scarcely as long; the peduncle at least as long as the carapace, 



