228 BULLETIN OF THE 
small lobes in the interbrachial spaces ; covered above and below with minute 
overlapping scales. Radial shields long, curved, and very narrow, a little wider 
without, but tapering inward, separated their entire length. Genital openings 
long, extending from the mouth-shield to the margin of disk, Ten or twelve 
flattened, smooth, bluntly pointed arm-spines, as long as a joint, arranged in a 
close line along the outer edge of the side arm-plate ; those above and below 
longer than the three middle ones. Tentacle-scales blunt dagger-shaped, and 
similar to arm-spines, but smaller. Color in alcohol, pale gray, mottled with 
reddish-brown, 
Sigsbee, off Havana, 175 fathoms, 1 specimen, 
Ophiopsila Riisei Lrx. 
Ophiopsila Riisei, Addit. ad Hist, Oph. Pt. II. p. 136. 1869. 
Station 11, 37 fathoms, 1 specimen. Key West, Fla., 3 specimens, 
Ophioplax Ljungmani Lrw. 
Ophioplaz Ljungmani, V. Catal. Mus. Comp. Zool, No. VIII, Pt. IL pe 22, PL 
Il. Figs. 24, 25. 1875. 
Station 45, 101 fathoms, 12 + specimens. Sigsbee, off Havana, 127 fath- 
oms, 1 specimen. Sigshee, off Havana, 80 fathoms, 1 specimen. 
Ophiopsepale Goésiana Lon. 
Ophiopapale Gotsiana, Of. Kong. Akad. Dr. Goés Oph. p. 615. 1871. 
Station 45, 101 fathoms, 1 specimen. Sigsbee, off Havana, 80 fathoms, 2 
specimens,  Sigsbee, off Havana, 177 fathoms, 1 specimen. Sigsbee, off 
Havana, 242 fathoms, 1 specimen.  Sigsbee, off Havana, 127 fathoms, 3 
Specimens. 
Ophiomyces frutectosus Lym. 
Ophiomyces frutectosus, Bull. Mus. Comp. Zool. I. No. 10, p. 945. 1869, 
Sigsbee, off Havana, 119 fathoms, 6 specimens. 
Ophiacantha aspera sp. nov. 
Plate I. Figs. 10-12. 
Special Marks. — Disk closely set with fine stumps, many of them forked. 
One large flat tentacle-scale, bearing long thorns, which give it a palmated 
look. Nine or ten slender, thorny, translucent arm-spines, 
Description of an Individual (off Havana).— Diameter of disk 5mm. Width 
of arm close to disk, without spines, 1.8 mm. Seven round pointed mouth- 
papille to each angle, the one at the apex being a little larger ; the outer one is 
sometimes flattened, with a toothed end. Mouth-shields small, slightly swollen, 
triangular, with a sharp angle within, and the outer edge much rounded ; 
length to breadth .7:.7. Side mouth-shields large, short, and broad, nearly 
semicircular, with curved edge outward, just touching within. Under arm- 
plates small shield-shaped, wider without than within, where they present an 
obtuse angle; lateral sides re-enteringly curved. Side arm-plates large, with 
