I IO 



Stat. 165. August 22. Anchorage on North-east side of Daram-island (False Pisangs), East 



coast of Misool. 49 m. Surface. 1 very young specimen. 

 Stat. 185. September 12. Lat. 3 20' S., long. I2722'.9E. HENSEN vertical net, from 1536 m. 



to surface. Many specimens (rf, 9 an d immature specimens). 

 Stat. 203. September 19. Lat. 3°32'.5S., lat. I24°I5'.SE. HENSEN vertical net, from 1500111. 



to surface. 9 specimens (3 <ƒ, 6 9)- 

 Stat. 216. October 30. Lat. 6° 49' S., long. I22°43' E. 2190 m. FüWLER closing net, from 



975 to 415 m. 1 specimen (9 with ovisac). 

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



to surface. 3 specimens (1 (j", 2 Q)- 

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



surface. 1 adult male. 



Description. — Closely allied to A T . microps, but smaller and more slender. Frontal 

 plate and rostrum in the female (fig. $6) shaped together as a triangle somewhat or slightly 

 less than twice as broad as long, with the major part of the lateral margins somewhat concave; 

 in the male (fig. 30) the same plate is either narrower or shorter. Lateral margin of the carapace 

 in the adult female without any denticle, in the male with at most a mere rudiment of a 

 denticle on each side a little before the posterior end. The eyes as in N. microps. Antennulae 

 in the female (fig. 3^) with the two distal peduncular joints a little more robust than in N. 

 microps \ in the male (fig. 3a) these two joints as in N. microps shorter and much thicker than 

 in the female. The proximal part of the lower antennular flagellum in the male (fig. 30) is 

 very curious: from the very thick basal joint it is directed outwards, then inwards, then again 

 somewhat outwards and again a little inwards, forming in this way a proximal portion curved 

 semicircularly outwards, while the following part is rather flatly curved. The last joint of the 

 elongated pair of legs less than three times as long as broad (fig. 3 f), with the largest spine 

 less coarsely serrated than in N. microps. 



The copulatory organs (fig. $(£) with the processes very different from those in A T . microps. 

 The spine-shaped process is somewhat short, at most about one-third as long as the proximal 

 process, but vet longer than the terminal process which is very short, spine-shaped, a little or 

 somewhat longer than the basal diameter of the process: the last-named process is rather long, 

 somewhat robust, nearly straight, with the end cut off or rounded and a few saw-teeth on the 

 most distal part of the outer margin (fig. 32). Lateral process somewhat shorter than the 

 proximal, with the end feebly serrated (figs. 3/ and 2>S)- 



Length of the male 10.2 — 11.2 mm., of the female about 12.5 mm. 



Remarks. - The males are easily distinguished from those of the other forms by the 

 proximal part of the lower antennular flagellum, besides from N. microps (and N. atlantica) 

 by quite different relative length of the processes on the inner lobe of the copulatory organs 

 and from N. tenella by the eyes. The females are somewhat similar to N. microps and N. 

 atlantica, but they are more slender and differ especially by having the frontal-rostral plate 

 shorter and broader than in these species. 



17. Ncmatoscelis tenella G. O. Sars. PI. XV, figs. \a — \m. 



1883. Nematoscelis tenella G. O. Sars, Forh. Vid. Selsk. Christiania for 1883, N° 7, p. 28. 

 1885. Nematoscelis tenella G. O. Sars, Challenger Rep. Vol. XIII, p. 133, PI. XXV, figs. 5—7. 



