NEMATOSCELIS MU'ROPS. 259 



copulatory organs possess the throe processes on the inner lobe, hut lh(> spine- 

 shaped process is nearly straight and nearly p;irallel with tlie two others wiiich 

 are inserted on the end of the lobe; the lateral process is never hook-shaped 

 and an additional process is wanting. — The females carry their eggs. 



It may be added that in the majority of the species the rostrum is rather 

 long or extremely so in the female, nnich smaller or quite rudimentary in the 

 adult male. 



Six species are known. They may be divided into two groups separated 

 by some sharp and interesting characters. 



A. Maxillulae with a pseudexopod well developed. First elongate pair of thoracic 



legs with long spines both from the terminal joint and from the distal end of 

 the penultimate joint. Endopod of second to fifth pairs of thoracic legs 

 ivith the full number, viz. three, joints beyond the knee. 



B. Maxillulae without pseudexopod. First elongate pair of thoracic legs ivith 



long spines only from the terminal joint. Endopod of second and third 

 pairs of thoracic legs with but two joints beyond the knee; endopod of fourth 

 and fifth pairs with only one joint beyond the knee. 



Group A comprises two species, but they are not represented in the 

 material received from Dr. Agassiz. Group B comprises four species which 

 can be separated by the key in the "Siboga" paper, p. 107; three of these 

 species are dealt with below. 



27. Nematoscelis microps G. O. Sars. 



Plate 9, figs. 4a-4d; Plate 10, figs, la-lb. 



1883. Nematoscelis microps. G. O. Sar.s, Forh. Viil. Selsk. Christiania for 1883, no. 7, p. 28. 

 1885. Nematoscelis microps G. O. Sars, Challenger Rept., 13, p. 131, pi. 2.5, figs. 1-4. 

 1910. Nematoscelis microps H. J. Hansen, Siboga-Exp., 37, p. 107, pi. 15, figs. 2a-2k. (With full 

 synonymy). 



Sta. 4679. Dec. 7, 1904. Lat. 17° 26.4' S., long. 86° 46.5' W. 300 fms. to surface. ' 1 specimen. 



Sta. 4681. Dec. 8, 1904. Lat. 18° 47.1' S., long. 89° 26' W. 300 fms. to surface. 6 specimens. 



Sta. 4683. Dec. 9, 1904. Lat. 20° 2.4' S., long. 91° 52.5' W. 300 fms. to .surface. 3 specimens. 



Sta. 4685. Dec. 10, 1904. Lat. 21° 36.2' S., long. 94° 56' W. 300 fms. to surface. 11 specimens. 



Sta.4687. Dec. 11, 1904. Lat. 22° 49.5' S., long. 97° 30.6' W. | gLts.'l^rS::. '^^^. 



Sta. 4689. Dec. 12, 1904. Lat. 24° 5' S., long. 100° 20' W. 300 fms. to surface. 1 specimen. 



Sta. 4691. Dec. 13, 1904. Lat. 25° 27.3' S., long. 103° 29.3' W. .300 fms. to surface. 5 specimens. 



Sta. 4695. Dec. 23, 1904. Lat. 25° 22.4' S., long. 107° 45' W. 300 fms. to surface. 2 specimens. 



Sta. 4701. Dec. 26, 1904. Lat. 19° 11.5' S., long. 102° 24' W. 300 fms. to surface. 4 specimens. 



Sta. 4703. Dec. 27, 1904. Lat. 17° 18.6' S., long. 100° 52.3' W. 300 fms. to surf.ace. 1 specimen. 



Sta. 4705. Dec. 28, 1904. Lat. 15° 5.3' S., long. 99° 19' W. 300 fms. to surface. 12 specimens. 



Sta. 4707. Dec. 29, 1904. Lat. 12° 33.2' S., long. 97° 42' W. 300 fms. to surface. 2 specimens. 



Sta. 4729. Jan. 19, 1905. Lat. 14° 15' S., long. 115° 13' W. Surface. 1 specimen. 



