236 BULLETIN OF THE 



Ophiernus adspersus sp. nov. 



Plate III. Figs. 19-21. 



Special Marks. — Two or three small, iinet^ual arm-spines. Arms flat and 

 very wide, their width being about one third the diameter of the disk. Mouth- 

 frames narrow and prolonged. 



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

 "Width of arm close to disk 4 mm. Four short, rounded, bead-like, close-set 

 papillae on either side of the narrow, prolonged mouth-angle, and three longer 

 ones under the teeth, which are five in number and are short and stout. 

 There are also three or four bead-like papilla on the side mouth-shield, and a 

 much wider one outside them, all of which may be considered as scales of the 

 second pair of mouth-tentacles. Mouth-shields about as broad as long, — 

 1.6 : 1.6, — of an angular heart-shape, with the point inward. Side mouth- 

 shields long triangular, embracing the sides of the mouth-shields and not 

 quite meeting within. First under arm-plate small and swollen, of an irreg- 

 ular rounded shape. The plates beyond are narrow, with lateral sides re- 

 euteringly curved opposite the tentacle-pores. They are very small, and 

 occupy not more than a quarter of the width of the arm. Side arm-plates 

 wide, thin, and flat ; they do not quite meet below, and are broadly separated 

 above by the iipper arm-plates, which cover all that surface of the arm ; they 

 are thus feebly arched, much wider than long, wider without than within, and 

 having the outer and inner margins straight. Disk flat, with re-entering 

 curves over the arms ; covered by thin, flat, irregular, strongly overlapping, ill- 

 defined scales, which are beset with minute granules, of which there are about 

 eight in the length of 1 mm. where they are closest. Radial shields nearly 

 naked, of an irregular pear-seed shape, with the point inward, widely sepa- 

 rated by the disk-scaling, and nearly naked ; length to breadth, 4 : 2. Lower 

 interbrachial spaces more finely and regularly scaled. Genital openings long 

 and wide, with a broad genital scale at the outer end. Arm-spines two, rarely 

 three ; they are slender and peg-like. The upper one is longest, and about 

 half as long as a joint. Two, rarely three, small, flat, oval tentacle-scales 

 standing on the side arm-plate. Color in alcohol, pale gray. The fragile arms 

 are long and slender, being about nine times the diameter of the disk. In its 

 natural state the disk is probably closely granulated, but the grains are easily 

 rubbed off". 



The wide arms and diff"erent mouth-angles distinguish it from O. vallincola. 



Station 129, Frederickstadt, 314 fattoms. Station 130, Santa Cruz, 451 fath- 

 oms. Station 150, between St. Kitts and Nevis, 375 fathoms. Station 148, St. 

 Kitts, 208 fathoms. Station 161, Guadeloupe, 583 fathoms'. Station 176, Do- 

 minica, 391 fathoms. Station 185, Dominica, 333 fathoms. Station 188, Do- 

 minica, 372 fathoms. Station 190, Dominica, 542 fathoms. Station 196, 

 Martinique, 1,030 fathoms. Station 221, St. Lucia, 423 fathoms. Station 

 222, St. Lucia, 422 fathoms. Station 226, St. Vincent, 424 fathoms. Sta- 



