NO. 2 ziesenhenne: newophiurans 15 



Types. — Holotype, AHF no. 5 ; 5 paratypes, one in M.C.Z. 



Type locality. — Station 810-38, 73 fms., off Barrington Island, Gala- 

 pagos, January 26, 1938. Six diskless specimens from Station 810-38 in 

 the Museum of Comparative Zoology and 2 diskless specimens from 

 Station 786-38, 392 fms., N.E. of Indefatigable Island, Galapagos, 

 January 18, 1938. 



Remarks. — This species is readily distinguished from the other known 

 members of the genus by the numerous tentacle scales, particularly the 

 long paddle-shaped ones. The numerous short and fine spines of the disk 

 and the numerous slender arm spines are also important characters. This 

 species has therefore been named multispinus with reference to the 

 numerous spines. 



Amphiuridae 



Genus OPHIOPHRAGMUS Lyman 



Ophiophragmus disacanthus, new species 

 Plate 9, Figs. 1-3 



Description. — Disk diameter, 4 mm.; arms, 33 mm. long. Disk pen- 

 tagonal, swollen, covered by numerous, overlapping disk scales; a large 

 central plate and 10 slightly smaller radiating plates. There are from 7 to 

 9 irregular series of scales in each interradius. The median series overlaps 

 the adjoining series, and they in turn overlap the adjacent series. The side 

 and upper disk scales meet to form a distinct disk margin. In each inter- 

 radius are 2 long, stout, flattened, marginal papillae. The length of the 

 papillae is 3 to 4 times its diameter. In comparison, the papillae exceed the 

 largest arm spine in length, but they are not so broad or so heavy. Radial 

 shields are about twice as long as wide, length less than half the disk 

 radius, in contact without, separated within by one disk scale. Interradial 

 edges covered by overlapping disk scales. 



Upper arm plates quadrangular, wider than long, side margins 

 broadly convex, proximal and distal margins slightly convex. Arm plates 

 fully in contact with each other. Side arm plates very narrow, separated 

 from each other by a membrane, not in contact above and barely in con- 

 tact below. Spine ridge large and prominent, bearing 3 short, heavy, 

 blunt-tipped spatulate arm spines. The spines are less than an arm seg- 

 ment in length; median spine narrow and short; upper and lower spines 

 heavy and broad, length 2 to 3 times the diameter of the spine. 



