MUSEUM OF COMPAEATIVE ZOOLOGY. 237 



tion 230, St. Vincent, 464 fathoms. Station 239, Grenadines, 338 fathoms. 

 Station 258, Grenada, 159 fathoms. Station 260, Grenada, 291 fathoms. Sta- 

 tion 264, Grenada, 416 fathoms. Station 288, Barbados, 399 fathoms. Station 

 291, Barbados, 200 fathoms. Capt. Bartlett, 1880, Lat. 17° 30' N., Long. 

 79° 14' W., 555 fathoms ; also, 17° 45' N., 77° 58' W., 322 fathoms. 



Ophioglypha fasciculata sp. nov. 



Plate III. Figs. 23-34. 



Special Marks. — Four spaced arm-spines. Upper surface of thick disk 

 chiefly covered by radial shields, rosette of primary plates and large plate in 

 each interbrachial space ; no large plate on margin. Basal under arm-plates 

 broader than long. Whole surface microscopically tuberculous. Papilla; of 

 arm-comb flattened spiniform. 



Description of an Individual. — Diameter of disk 13 mm. Width of arm 

 near disk 3 mm. Three or four rectangular, crowded papilLx on each side of 

 a mouth-angle, and two or three conical ones at its apex. Mouth-shields very 

 large, much longer than broad, having the outline of a wide-mouthed jug, and 

 with the small lobe-like end inward ; length to breadth, 3 : 2. Side mouth- 

 shields narrow, and of nearly equal width, meeting fully within. First under 

 arm-plate larger than any other, longer than wide, narrower within than 

 without ; the rest, within disk, are wider than long, and four-sided ; those 

 beyond become gradually hexagonal. Side arm-plates swollen, meeting nei- 

 ther above nor below. Basal upper arm-plates more than twice as broad as 

 long, with well-marked angles at their lateral ends. Disk thick, covered above 

 by a central rosette of large primary plates and a large plate in each inter- 

 brachial space ; on margin of disk are a lot of small scales, and a single line 

 between the chief plates. Lower interbrachial spaces partly covered liy large 

 mouth-shield, and partly by imbricated scales. Radial shields longer than 

 wide, irregular and somewhat angular in outline, joined for about half their 

 length. Genital scales narrow next radial shield, but growing wider without ; 

 they bear on their free edge a continuous but not crowded line of small, sharp 

 papilla), which on the upper side of arm become spiniform, and form the 

 comb. Four spaced arm-spines al)out two thirds as long as a joint. Tentacle- 

 pores large ; mouth-tentacles with a straight line of five or six small, squarish, 

 crowded scales on either side ; the others, within the disk, have usually five 

 on the side arm-plate, and two or three on the under arm-plate. Color in 

 alcohol, pale gray. 



Station 281, Barbados, 288 fathoms, 2 specimens. 



O. bullata is nearest, but differs in finer disk-scales, large marginal plates, 

 separated radial shields, differently shaped arm-comb papillae, and only three 

 minute arm-spines. 



