MUSEUM OF COMPARATIVE ZOOLOGY, 89 
length by a round plate without and several smaller plates within. Inter- 
brachial space below chiefly covered by the great mouth-shields, outside which 
are three or four rows of small scales, and on either side a genital scale, bearing 
on the free edge broad, square, close-set papillae, which become narrower where 
they form the arm-comb, on the broadened outer end of the genital scale. 
Three small sharp arm-spines, one situated in a notch well up on the outer 
edge of the side arm-plate, the other two lower, near junction of side with 
under arm-plate. Tentacle-pores very large, transverse oval in shape; on 
those of the mouth-tentacles four rounded scales on the under arm-plate, and 
three on the other side ; the other pores within disk have usually four on 
the inner side, and one wide scale on the outer. Color in alcohol, body gray, 
arms straw-color, 
Station 157, 1950 fathoms, 4 specimens. 
Ophioglypha radiata sp. nov. 
Plate III. Figs. 65, 66. 
Special Marks. — Two minute arm-spines, Mouth-shield trefoil. Under 
arm-plates axe-shape, Radial shields small and rounded. Disk high> Basal 
under arm-plates about as long as broad. Arms high and rounded. 
Description of an Individual (Station 205). — Diameter of disk 8.5 mm. 
Length of arm 35.5 mm. Width of arm close to disk 3 mm. Four or five 
wide, rectangular, closely set mouth-papille on either side, with three long and 
pointed at apex of jaw. Mouth-shields large, trefoil-shape, with a pointed lobe 
inward, Side mouth-shields very narrow, of even width and meeting within. 
First under arm-plate largest of all, triangular, with an angle within and outer 
edge much curved ; the other plates are axe-shaped, with re-entering lateral 
sides and curved outer side ; the first three touch each other. Side arm-plates 
thick, swollen, and minutely tuberculous, meeting on the under surface beyond 
the third plate. Upper arm-plates much swollen, the first two rounded hex- 
agonal, those beyond rounded triangular. Disk high and rounded, covered with 
fine overlapping scales, of which the marginal are the larger. Radial shields 
small, broader than long, four-sided, with rounded corners, outer edges straight, 
touching nearly their whole length, diverging inward, where they are separated 
by a small triangular plate. There are small round primary plates, widely 
separated by the finer disk-scales, Genital scales short, wider without than 
within, bearing along their entire margin long, flat, and closely set papilla, 
about fourteen in number ; those towards upper surface much narrower than 
the under ones, Two very minute arm-spines, one situated low on the edge of 
the side arm-plate, next the tentacle-pore, the other half-way up the arm. 
Tentacle-scales curved ; from three to four on either side of the large pores on 
the basal joints, Color in alcohol, pale yellow. 
Station 205, 1050 fathoms, 6 specimens, 
