218 BULLETIN OF THE 



Ophioglypha acervata Lym. 



Ophioghjpha acervata, Bull. Mus. Conip. Zoiil. Vol. 1. No. 10, p. 316. 1869. Ill- 



Catal. Mus. Coinp. Zool. No. VL PI. L 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. Couip. Zoiil. Vol. I. No. 10, p. 319. 1869. 111. 

 Catal. Mus. Conip. Zoiil. No. VI. PI. 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 arm close to disk 1 mm. Mouth-papillae 

 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. Fii-st under 

 arm-plate nearly triangular ; those beyond are longer tlian 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 

 triangular 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. 40 - 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 

 fourtli under j)late. Genital openings bounded by small, close-set papilla). 

 Disk covered above by large radial shields and small irregular scales, among 

 whi(;h the ])rimary plates are scarcely conspicuous. Arm-spines minute. 



Description of an Individual (Station 29). — Diameter of disk 18 mm. 

 Width of arm without K])ines 3.5 mm. Length of arm about 90 mm. Six 



