MUSEUM OF COMPARATIVE ZOOLOGY. TS 
are long and large, and have from four to six small tentacle-scales on each 
side. Those a little beyond the disk have only one scale on the inner side 
and none on the outer. Color in alcohol, white. 
Station 218, 1070 fathoms, 6 specimens. 
Ophioglypha imbecilis sp. nov. 
Plate III. Figs. 63, 64. 
Special Marks. — Three slender, equally spaced arm-spines. Mouth-shield 
trefoil, with a long lobe inward. Disk thin, with rather delicate scales. Arms 
slender. 
Description of an Individual (Station 232).— Diameter of disk 6.5 mm. 
Length of arm 20 mm. Width of arm near disk 1 mm. Mouth-papille four 
or five on each side, square, short, and closely set, with a pointed one at apex 
of jaw. Mouth-shields trefoil-shaped, with a lobe inward; length to breadth 
1.5: 1.5, Side mouth-shields curved, long, and narrow, of nearly even width, 
and meeting within, First arm-plate triangular, with angle inward, and outer 
side curved ; second plate, which is largest of all, axe-shaped, with lateral sides 
re-enteringly curved; the rest are triangular, with outer side curved, and 
diminish constantly in size. Side arm-plates straight and rather delicate, 
meeting broadly above and below, beyond the second upper arm-plate. 
Upper arm-plates triangular, with acute angle inward, and outer edge curved. 
Upper surface of disk covered with irregular, rather thin plates. Radial 
shields longer than broad ; outer edges curved, meeting broadly without, diverg- 
ing inward, where they are separated by a smaller and larger plate. On the 
interbrachial margin of the disk is a large oval plate, broader than long, con- 
necting the radial shields ; in the centre a circular primary plate, surrounded 
by numerous others, irregularly shaped. Genital scales long and broad, bear- 
ing three or four papillae near their outer end. Outside the mouth-shield and 
between the genital scales are two large semicircular plates, whose outer edges 
reach the margin of the disk. Three arm-spines, tapering, very delicate, situ- 
ated half-way up on the side arm-plate, near base of arm ; they are about half 
as long as a joint. Tentacle-scales minute and semicircular, two on either side 
of first two pores ; at the third, two on the outer and one on the inner side; 
for the rest only one. Color in alcohol, gray. 
Station 232, off Enosima, 340 fathoms, 5 specimens, 
Ophioglypha irrorata sp. nov. 
Plate IV. Figs. 106 - 108. 
Special Marks, — Three very short, small, sharp arm-spines, low down. 
Mouth-shield wider than long, with a point within. Radial shields long and 
separated. Papillæ of arm-comb close-set, flat, and with rounded ends. 
Desrription of an Individual (Station 143). — Diameter of disk 8.5 mm. 
