84 BULLETIN OF THE 
one or two on the outer side. The entire surface is microscopically tuberculous, 
Color in alcohol, straw. 
Station 45, 1240 fathoms, (young.) Station 54, 2650 fathoms, 8 specimens. 
Station 61, 2850 fathoms, 12 + specimens. Station 133, 1900 fathoms, 5 
specimens. 
Ophioglypha convexa sp. noy. 
Plate XIX. Figs. 83, 84. 
Special Marks. — Three small tapering arm-spines. Disk covered above by 
a rosette of large angular primary plates, radial shields, and a few large inter- 
brachial plates. 
‘Description of an Individual (Station 241). — Diameter of disk 12 mm, 
Length of arm 30 mm. Width of arm close to disk, without spines, 3 mm. 
Mouth-papill;e small, conical, four to six on each side, and three larger at angle 
of jaw. Mouth-shield large, much longer than wide, five-sided, with an angle 
inward, and outer edge, which is wider than inner, much curved ; length to 
breadth 4 : 3.5. Side mouth-shields short, wider within than without, meeting 
broadly and oceupying only the inner angle of the mouth-shield. First under 
arm-plate three-sided, with truncated angles ; beyond they are nearly square, 
with truncated corners and their lateral sides re-enteringly curved ; those 
farther out are octagonal, and afterwards hexagonal. Side arm-plates thick, 
swollen, meeting neither above nor below, except at end of arm. Upper arm- 
plates much broader than long, hexagonal, arched. Disk thick, covered above 
with a few stout plates. Radial shields angular, pear-seed shape, somewhat 
sunken, joined without but diverging inward, where they are separated by a 
thick wedge-like scale ; length to breadth 3:2. In the interbrachial spaces 
are five large plates, two on margin of disk, connecting the outer ends of the 
genital scales ; one quadrangular, connecting the radial shields ; and two 
smaller, which lie between inner ends of radial shields. The central space is 
covered by six regular, stout primary plates, elevated above the rest, the central 
one pentagonal, the others hexagonal. "The genital scales fill the lower inter- 
brachial space between mouth-shield and arm, and bear on their free edge a 
close row of square papilla, which become peg-like on the arm-comb.: Beyond 
the mouth-shield is a row of three small rounded marginal plates. Three 
short, delicate, tapering arm-spines, equally spaced. "Tentacle-pores within the 
disk have two or three scales on the inner side, and one or more on the outer. 
Color in alcohol, yellowish-gray. 
Station 241, 2300 fathoms, 2 specimens (young). Station 246, 2050 fathoms, 
6 specimens; Station 346, 2350 fathoms, 4 specimens. 
Ophioglypha sculptilis sp. nov. 
Plate IV. Figs. 115, 116. 
Special Marks. —Six minute arm-spines. First under arm-plate broader 
than long; those beyond longer than broad. Radial shields separated within 
