218 BULLETIN OF THE 
Ophioglypha acervata Lym. 
Ophioglypha acervata, Bull. Mus. Comp. Zod]. Vol, I. No. 10, p. 316. 1869. ni. 
Catal. Mus. Comp. Zoül. No. VI. Pl. I. Fig. 6. 1871. 
Station 35, 804 fathoms, 1 specimen. Station 36, 84 fathoms, 3 specimens. 
Sigsbee, off Havana, 128—240 fathoms, 2 specimens (var?).  Sigsbee, off 
Havana, 119 fathoms, 5 specimens. 
Ophioglypha falcifera Lym. 
Ophioglypha falcifera, Bull. Mus. Comp. Zod], Vol. I. No. 10, p. 319. 1869, Ill. 
Catal. Mus. Comp. Zool. No. VI. Pl. I. Figs. 3, 4. 
Station 43, 339 fathoms, 1 specimen. Station 44, 539 fathoms, 1 specimen. 
Ophiomastus secundus sp. nov. 
Plate II, Figs. 16 - 18. 
Special Mark. — One tentacle-scale. 
Description of an Individual (Station 43). — Diameter of disk 2.7 mm. 
Length of arm 5 mm. Width of atm close to disk 1 mm. Mouth-papille 
represented only by a narrow border along the sides of the mouth-frames, with 
one large and much swollen one at apex of jaw. Mouth-shield somewhat 
sunken, five-sided, with sharp angle inward. Side mouth-shields large, 
much swollen, ovoid, longer than broad, meeting broadly within. First under 
arm-plate nearly triangular ; those beyond are longer than broad, with a blunt 
angle inward, outer edge rounded, and small re-entering curves on the lateral 
sides, Side arm-plates very large, much swollen without, meeting broadly 
below, and above beyond the first upper arm-plate ; wider in the middle, and 
narrower at the upper and lower ends. Upper arm-plates as broad as long, 
quadrangular, with broad angle within and a curve without. Disk dome-shape 
and very high, with a rosette of six large angular primary plates in the centre, 
and covering nearly the whole upper surface ; outside these are the radial shields, 
short and wide ; widest without, where they have a curved edge; closely joined 
their whole length. Interbrachial space below covered by one or two small 
iriangular scales. One, or more usually two, very short blunt arm-spines, 
situated midway on the outer edge of the side arm-plate. One tentacle-scale. 
Color in alcohol, pale straw. 
Station 43, 339 fathoms, 2 specimens. 
Ophiomusium planum sp. nov. 
Plate III. Figs. 46 - 48. 
Special Marks. — Arms even and cylindrical. Upper and under arm-plates 
persistent nearly to end of arm, but no tentacle-scales beyond the third or 
fourth under plate. Genital openings bounded by small, close-set papilla. 
Disk covered above by large radial shields and small irregular scales, among 
which the primary plates are scarcely conspicuous. Arm-spines minute. 
Description of an Individual (Station 29). — Diameter of disk 18 mm. 
Width of arm without spines 2.5 mm. Length of arm about 90 mm. Six 
