44 BULLETIN OF THE 



OPHIOCHONDRUS Ltm. 

 Ophiochondrus stelliger. 



Plate XIII. Figs. 371-373. 



Special Marks. — Disk finely and evenly granulated on both sides. Four 

 slender arm-spines, whereof the uppermost is much the longest. 



Description of an Individual (Station 320). — Diameter of disk 5 mm. Length 

 of arm 16 mm. Width of arm near disk 1.3 mm. Three mouth-papillas on 

 each side, whereof the two outer are flattened and squarish, while the inner- 

 most is stout, rounded, tapering, and peg-like. Apex of mouth-angle occupied 

 by the lowest tooth, which sometimes is represented by two blunt, spiniform 

 papillae similar to their next neighbor. Four rather narrow teeth, which 

 sometimes are almost spiniform, but usually are flattened. Mouth-shields 

 much wider than long, with a well-marked obtuse angle inward and the outer 

 side gently curved ; length to breadth,.? : 1.1. Side mouth-shields long, rather 

 narrow, of nearly equal width, slightly curved, and fully meeting within. First 

 under arm-plate small, longer than broad, hexagonal, with rounded corners ; 

 the plates beyond are rather small, wider than long, bounded without by a 

 broad curve, and within by an obtuse angle ; the lateral sides are very short, 

 or are confounded in the outer curve. Side arm-plates small, somewhat wider 

 than long, fan-shaped, with inner angle rounded. Disk rather thick, finely and 

 uniformly granulated above and below, about 17 grains in the length of 1 mm. 

 Four cylindrical, tapering, rather slender arm-spines, whereof the uppermost is 

 longest : lengths to that of an arm-joint, 1.1, .6, .5, .4 : .6. One small, narrow 

 tentacle-scale. Color in alcohol, straw. 



Station 320, 600 fathoms, 7 specimens. 



OPHIOCONIS Ltk. 

 Ophioconis antarctica sp. nov. 



Plate XIV. Figs. 380-383. 



Special Marks. — Seven slender, cylindrical, tapering arm-spines, the two 

 upper ones longest. One large tentacle-scale. Disk closely granulated, except 

 mouth-shield ; 5 or 6 grains in the length of 1 mm. 



Description of an Individual (Station 150). — Diameter of disk 13 mm. 

 Length of arm about 60 mm. Width of arm at base, without spines, 2 mm. 

 There are to each angle of the mouth twelve or fourteen papillae, of which the 

 innermost are slender and pointed, while the outer one on either side is broad 

 and squarish ; at the apex there is a cluster of four or five, which properly 

 might be called tooth-papillae. Five or six rather narrow, flat, blunt teeth, 

 whereof the lowest is often split in two. Mouth-shields broad triangular, with 

 a blunt angle inward and outer edge nearly straight ; they are more or less 

 obscured by granules, which completely hide the side mouth-shields. These 



