NEMATOSCELIS MICROPS. 259 
copulatory organs possess the three processes on the inner lobe, but the spine- 
shaped process is nearly straight and nearly parallel with the two others which 
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, much 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. Mazillulae 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 
with the full number, viz. three, joints beyond the knee. 
B. Mazillulae without pseudexopod. First elongate pair of thoracic legs with 
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—td; Plate 10, figs. la-lb. 
1883. Nematoscelis microps. G. O. Sars, Forh. Vid. Selsk. Christiania for 1883, no. 7, p. 28. 
1885. Nematoscelis microps G. O. Sars, Challenger Rept., 13, p. 131, pl. 25, figs. 1-4. 
1910. Nematoscelis microps H. J. HANsaN, Siboga-Exp., 37, p. 107, pl. 15, figs. 2a-2k. (With full 
synonymy). 
Sta. 4679. Dec. 7,1904. Lat. 17° 26.4’S., long. 86° 46.5’ W. 300fms.tosurface. 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. tosurface. 11 specimens. 
Bay Dec 11, 1904. Lat. 22° 49.5'S,, long. 97° 30.6’ W. 4 200 *m® t© surface. 3 specimens. 
( 2125 fms. to surface. 1 specimen. 
Sta. 4689. Dec. 12,1904. Lat. 24°5’S., long. 100° 20’ W. 300fms.tosurface. 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. tosurface. 1 specimen. 
Sta. 4705. Dec. 28,1904. Lat. 15°5.3’S.,long.99°19’W. 300fms.tosurface. 12 specimens. 
Sta. 4707. Dec. 29,1904. Lat. 12°33.2’S., long. 97°42’ W. 300fms.tosurface. 2specimens. 
Sta. 4729. Jan.19,1905. Lat. 14° 15’S., long. 115° 13’ W. Surface. 1 specimen. 
