100 BULLETIN OF THE 



Ophioglypha Lymani Ljn. 

 Ophioglypha Lymani, Om tvanne nya arter. Of. Kong. Akad. No. 5, p. 472. 1870. 



Station 304, 45 fathoms, 2 specimens. Station 305, 120 fathoms, 12 speci- 

 mens. Station 307, 147 fathoms, 12 + specimens. Station 308, 175 fathoms, 

 1 specimen. Station 309, 40- 140 fathoms, 3 specimens. Station 311, 245 

 fathoms, 1 specimen. Station 313, 50 fathoms, 12 -f specimens. 



OPHIOCTEN Ltk. 

 Ophiocten amitinum sp. nov, 



Plate V. Figs. 129, 130. 



Special Marks. — Primary and marginal disk-plates large and conspicuous. 

 Arm-comb and papillae on first two upper arm-plates well marked. Two 

 minute tentacle-scales. 



Description of an Individual (Kerguelen Islands). — Diameter of disk 7 mm. 

 Length of arm about 35 mm. Width of arm without spines 1.5 mm. Four 

 short blunt moutli-papillis on each side, and one longer and pointed at apex 

 of jaw. Mouth-shield large, pentagonal, broader within than without, having 

 a wide angle within, and outer corners curved ; length to breadth 1 .3 : 1 .4. 

 Side mouth-shields small, broader without than within, where they meet and 

 are often somewhat separated from the mouth-shield. First under arm-plate 

 large, rounded triangular, with outer edge straight ; the remaining plates small 

 and three-sided, nuich wider than long, with outer edges strongly curved and 

 inner laterals re-enteringly curved, the whole presenting almost a crescent 

 shape ; they become very small towards tip of arm. Side arm-plates broad, 

 Jlaring somewhat outward, meeting broadly below ; separated above by the 

 upper arm-jdates, which are broader than long, with lateral sides straiglit, and 

 outer edge, which is wider than iiuier, curved. Disk round, flat, and rather 

 thick, covered with thin flat scales and plates of various sizes, among which 

 are six rounded primaries, separated by single lines of small scales ; in the 

 brachial space, just inside the radial shields, there is a transverse row of 

 larger rounded scales ; in each interbrachial space are two separated plates 

 similar to the primaries, and outside these, along margin of disk, is a row of 

 four connected plates. Radial rtliields conspicuous, pear-seed shaped, Avidely 

 separated by disk-scales. Outside the radial shields is an arm-comb of small, 

 short-pointed papilla;, part carried on outer point of genital scale and part on 

 outer edge of radial shield and on the scale between the radial shields ; besides 

 tliest! there is on the outer edge of the first three upper arm-plates a. row of 

 from three to five papilla;. Lower interbrachial space covered by regular rows 

 of small, semicircular, overlapping .scales, and l)y the genital scales, which arc 

 longer than broad, and slightly wider witlumt than within, and sometimes 

 carry on their free edge un irregular row of minute papilla). First pair of 

 tentacle-pores have two very small scales on the outer edge, the rest have one 



