230 BULLETIN OF THE 
to fourteen stout, more or less spiniform mouth-papillo to each angle, whereof 
the outer are longer; at the apex of jaw are one or two papillæ which are largest 
of all. Mouth-shield much broader than long, with an obtuse, rounded angle 
within, outer edge slightly lobed, and lateral sides curved ; length to breadth 
.7:1.5 mm. Side mouth-shields long, oval, stout, meeting within, the outer 
edge being broadly connected with the first under arm-plate, which is larger 
than usual, with a small lobe without. Those beyond are shield-shaped, longer 
than broad, wider without than within, where they present an obtuse angle ; 
while the outer side is strongly curved, and the laterals re-enteringly curved, 
and outer edge, which is wider than inner, gently curved. Side arm-plates 
large, with a prominent spine-ridge, meeting fully above and below. Upper 
arm-plates small, of a transverse diamond-shape, with outer and inner angles 
more or less rounded. Disk flat and thin, covered with delicate spines, which 
obscure the sealing. Radial shields small and wide, joined their entire length, 
with a rounded angle inward, and lateral edges nearly straight. Nine very 
slender, glassy, long, gently tapering, thorny arm-spines, the upper one longest 
and equal to three arm-joints. Tentacle-scales long, sharp, dagger-shaped, and 
situated on the inner edge of the tentacle-pore. Color in alcohol, straw. 
Station 29, 955 fathoms, 1 specimen. 
Ophiacantha Troscheli Lym. 
Ophiacantha Troscheli, Bull. Mus, Comp. Zool. Vol. V. No. 7, p. 142, Pl. IX. Figs. 
228, 224. 1878. 
Station 45, 101 fathoms, 3 specimens. 
Ophiacantha vepratica ۰ 
Ophiacantha vepratica, Bull. Mus. Comp. Zool Vol. V. No. 7, p. 137, Pl. X. Figs. 
245-247. 1878. 
Station 41, 860 fathoms, 2 specimens. 
Iam unable to see any reliable specific difference between these specimens 
and those got by the “ Challenger” in 600 fathoms near the Fiji Islands. 
Ophiacantha pentacrinus Lrx. 
Ophiacantha pentacrinus, Addit. ad Hist, Oph. Pl. III. pp. 46, 99. 1869. 
Ophiacantha meridionalis Lym., Bull. Mus. Comp. Zoól. Vol. I. N. p. 824, 1869. 
Station 43, 339 fathoms, 9 specimens. Station 44, 539 fathoms, 1 specimen. 
Sigsbee, off Havana, 175 fathoms, 1 specimen. 
Ophiacantha hirsuta Lvw. 
Ophiacantha hirsuta, Ill. Catal. Mus. Comp. Zool. VIII. Pt. II. p. 12, Pl. II. Figs. 
21-23. 1875. 
Sigsbee, off Havana, 175 fathoms, 1 specimen. Sigsbee, off Havana, 127 
fathoms, 3 specimens. 
