MUSEUM OF COMPARATIVE ZOOLOGY. 41 



curves, and within by an obtuse or truncated angle. Side moutli-sliields of 

 moderate width, nearly meeting above and below, and having a well-marked 

 spine-crest. Upper arm-plates broad, transverse diamond-shaped, with outer and 

 inner angles rounded. Disk covered with rather thick overlapping scales, 

 which are finest below, near the mouth-shields, where there are about 7 in the 

 length of 1 mm. Above, the centre is occupied by a rosette of two circles of 

 large rounded plates partially separated by a few small scales. Radial shields 

 short, wide pear-seed shaped, separated their entire length by a narrow wedge of 

 three scales. On interbrachial spaces below, a few minute, peg-like spines. 

 Four short, cylindrical, tapering, blunt arm-spines, all stout, especially the 

 lower ones ; upper spine longest, and about as long as one and a half joints. 

 One large oval tentacle-scale. Color in alcohol, pale straw. 

 Station 73, 1,000 fathoms, 2 specimens. 



Ophiactis asperula Ltk. 



Ophiactis asperula. Addit. ad Hist. Oph., Pt. II., 1859, p. 130. 



Ophiactis magellanica Ljn. Of. Kong. Akad. Oph. Viv., 1866, p. 325. 



Station 308, 175 fathoms, 1 specimen. Station 31 1, 245 fathoms, 1 specimen. 

 Station 312, 10-15 fathoms, 12+ specimens. Station 315,5-12 fathoms, 7 

 specimens. 



Ophiactis carnea Ljn. 



Ophiactis carnea. Of. Kong. Akad. Oph. Viv., 1866, p. 324. 



Station, Simon's Bay, Cape of Good Hope, 10 - 20 fathoms, 4 specimens. 



Ophiactis Savignyi Ljn. 



Ophiactis Savignyi. Of. Kong. Akad. Oph. Viv., 1866, p. 323. 



Station 208, 18 fathoms, 1 specimen. Zanzibar, 10 fathoms, 2 specimens. 



Ophiactis Miilleri Ltk. 



Ophiactis Mulleri. Vid. MeddeL, Jan. 1856, p. 12. 



Off Bahia, Brazil, 7-20 fathoms, 2 specimens, var. quinqueradia. Station 

 122, 350 fathoms, 2 specimens. 



OPHIOSTIGMA Ltk. 

 Ophiostigma africanum. 



Plate Xm. Figs. 368-370. 



Special Marks. — Arms more than eight times the diameter of disk. Outer 

 mouth-papillae very wide. Radial shields long, narrow, and joined. 



Description of an Individual (Cape de Verde Isl.). — Diameter of disk 2.2 mm. 



