MUSEUM OF COMPARATIVE ZOOLOGY. 77 
of the mouth-tentacles ; the second pores have three on each side, and those 
beyond not so many. Beyond the disk there are no tentacle-scales, and the 
tentacles are very minute. Color in alcohol, white. 
This species is pretty near O. Lymani, but is readily distinguished by its 
flat upper arm-plates, those of O. Lyman? being high and more or less ridged. 
Station 141, 98 fathoms, 6 specimens (young) Station 142, 150 fathoms, 
6 specimens, 
Ophioglypha albata sp. ۰ 
Plate IV. Figs. 95-97. 
Special Marks. — Six short, blunt, peg-like, evenly spaced arm-spines. Arms 
narrow. Radial shields short, and separated by one or two large rounded 
plates. Papille of arm-comb close-set, flat, and with rounded ends. 
Description of an Individual (Station 236). — Diameter of disk 10 mm. 
Length of arm about 40 mm. Width of arm close to disk 2 mm. Three 
short, crowded mouth-papillo on each side, with one (or sometimes three) coni- 
cal at apex of jaw.  Mouth-shield pentagonal, having a blunt angle within 
and outer corners curved ; length to breadth 1.5 : 1.3. Side mouth-shields 
narrow, meeting within ; running along inner angle of mouth-shield, and pass- 
ing beyond to join first under arm-plate, where they are widest. First under 
arm-plate irregular transverse oval; second plate short, bell-shaped, wider 
without than within ; those immediately beyond are five-sided, wider without 
than within, with outer edge eurved, a blunt angle inward, and inner lateral 
sides a little re-enteringly curved ; about half-way out on the arm they 
become nearly triangular, broader than long, with outer angles much curved. 
Side arm-plates broad, but little swollen, not meeting below within the disk, 
widely separated above by the upper arm-plates, of which the sécond and 
third are hexagonal, while those beyond are lengthened, their two outer 
angles blended in a curve, and the inner side very short. Disk smooth 
and slightly arched, covered with thin, rounded or angular, closely soldered 
scales, the six primaries being a little larger and separated by one or two rows 
of scales ; there is a transverse row of three large angular plates extending 
along the margin and connecting the radial shields, Which are longer than 
wide, angular, widely separated by two or three large scales ; their outer 
points may or may not meet : under surface covered by rows of thin, ill-defined 
plates, similar to those above. Genital scales hidden by the disk-scales ; 
along their free edge is a close row of short, bead-like papilla : they become 
larger and more rounded where they pass upward to make the arm-comb, 
which is attached to the radial shield. Six short, blunt, conical arm-spines, 
arranged along the entire margin of the side arm-plate. The pores of the 
mouth-tentaeles are large, and have four short close-set scales on either 
side ; the two next have three small rounded scales on the inner side ; those 
beyond have two. There are also minute and not easily seen scales on the 
outer side of the second and third pores, Color in alcohol, white. 
Station 236, 775 fathoms, 1 specimen. 
