MUSEUM OF COMPARATIVE ZOOLOGY, 91 
shields longer than broad; wider without than within, where they present a 
rounded angle ; outer corners also rounded ; on the lateral sides a constriction 
which gives them a three-lobed aspect; length to breadth 2.5: 2.3. Side 
mouth-shields small, long, very narrow ; outer end slightly broader than the 
inner, where they meet. First under arm-plate triangular, with truncated 
angle inward and outer edge curved ; the next four are four-sided, with curved 
outer edge ; beyond the disk they are pentagonal, with an obtuse angle inward, 
short lateral sides, and a long curved outer side. Side arm-plates thick, deeply 
constricted at their inner end ; not meeting below till some distance beyond the 
disk, separated above by upper arm-plates, which are broader than long, wider 
without than within, the outer edge being curved. Disk thick, covered with 
large, closely soldered plates and scales, Radial shields pear-seed shape, longer 
than wide, with an angle within and outer edges rounded ; touching without, 
separated within by a single wedge-like plate ; in the centre above is a close 
rosette, consisting of a pentagonal primary plate, surrounded by five others, 
smaller and of an irregular shape ; the remaining interbrachial spate on the 
upper surface is occupied by rows of semicircular plates. Lower interbrachial 
space, covered by small curved, overlapping plates. Genital scales very nar- 
row, except without, where they broaden into a wide radial scale, bearing a 
comb of short spines, which continue below as minute papillo on the margin 
of the genital opening. Ten or twelve fine, short, blunt arm-spines, extending 
in a close continuous row along outer edge of side arm-plate. Tentacle- 
scales short, square, large, and thin. The pores of the mouth-tentacles carry 
five or six on each side; the pores immediately beyond are very large, and 
have about four on each side ; beyond the disk they have three or four on. the 
inner side, and one spiniform on the under arm-plate, Color in alcohol, light 
gray. 
Station 235, 505 fathoms, 1 specimen. 
Ophioglypha solida sp. nov. 
Plate V. Figs. 120 - 122. 
Special Marks. — Basal under arm-plates, beyond the second, about as long 
as broad, squarish, and with water-pores between them. Arms high, with 
swollen upper arm-plates and very small spines. Upper disk covered in 
great part by a rosette of primary plates and by radial shields. 
Description of an Individual (Station 192). — Diameter of disk 10.5 mm. 
Width of arm close to disk, without spines, 3 mm. Eight minute, widely 
separated, pointed mouth-papille on each side of angle, with a cluster of three 
bluntly pointed at apex of jaw. Mouth-shields narrow, pear-seed shaped, with 
sharp angle inward, and outer edge much rounded ; length to breadth 2: 1.5. 
Side mouth-shields longer than broad, much wider without than within, where 
they meet, extending nearly two thirds of the distance on sides of mouth- 
shield, First under arm-plate three-sided, longer than wide, with rounded 
angle inward, and a slight re-entering curve on all three sides ; the next six or 
