OPHIURID^:. 
Ech. 11 
100-162 fatli. ; histrix, sp. u., id. (tin), p. 232, pi. i. figs. 13-16, oft 
Havana, 176 fath. 
Ophiothela holdsworthi., sp. n., Smith (17 b), Ceylon (of large size, com- 
pared with the other species of the genus). 
Ophioscolex dentatus, sp. n., Lyman (11 a), p. 157, pi. vii. figs. 184-186, 
Agulhas Bank, 150 fath. ; ? tropicus, sp. n., id. ibid. pi. vii. figs. 190-192, 
off St. Thomas, 390 fath. 
Ophiolebes, g. n., Lyman (including Ophiactis clavigera, Ljgm.). “ Disk 
and arms stout, covered by a thick skin, bearing grains or stumps, and 
hiding more or less the underlying plates ; arm-spines short, blunt, 
thorny, covered by thick skin, on the sides of the slightly projecting side- 
arm- plates ; teeth; no tooth- papillae ; long, stout, mouth-papillae; jaw- 
covers large and wide, connected into a circle ; arm-plates rather small, 
nearly as in OphiacantJia.'’ 0. scoideus, sp. n., id. (11a), p. 158, pi. vii. 
figs. 196 & 197, Southern Seas, 310 fath. ; vestitus, sp. n,, id. ibid. p. 169, 
pi. X. figs. 255-257, Southern Atlantic, 140-400 fath. 
Ophiosciasma, g. n., Lyman (allied to Ophioscolex). “ Skin of the di.sk 
thick, soft, finely granulated, arms very slender, lower and side-plates 
imperfectly calcified ; no upper plates ; a bunch of mouth-spines, or 
thorns, at apex of jaws, representing teeth- and mouth-papillae ; arm- 
spines on sides of side-arm-plates ; genital openings large.” 0. attenuatum, 
sp. n., id. (11 a), p. 160, pi. vii. figs. 193-195, Atlantic, 350 fath. 
Ophiogeron, g. n., Lyman (allied to Ophiomyxa and Ophioscolex^. “ Skin 
of disk naked ; mouth angles naked, except a few small teeth on the 
jaws ; under arm-plates small ; tentacle-pores large; side -arm-plates some- 
what flaring, carrying thorny arm -spines covered with skin ; upper arm- 
plates, none.” 0. edentulus,^,^. n., id. (11 a), p. 161, pi. vii. figs. 178-180, 
Eastern Seas, 1360 fath. 
Luethenia,^^ g. n., Duncan (3 a) = Ophiopleura, Kor. Dan., but the typical 
species, 0. arctica, sp. n. (Discovery Bay), is probably different from 
0 borealis, K. D. 
Sigsbe [e] ia, g. n., Lyman (allied to Bemieuryale). Disk small, covered 
with heavy plates or scales, and passing insensibly into the stout arms, 
capable of being rolled in vertically ; teeth ; mouth-papillae ; no tooth 
papillae ; arms with the usual plates and a large supplementary plate, 
extending downwards from the upper arm-plate ; genital openings ex- 
tending to margin of disk.” S. murrhina, sp. n., id. (11 b), p. 234, pi. iii. 
figs. 55-58, off Havana, 175 fath. (arms rolled round Stylasler filogranus, 
which is mimicked by its porcelain surface). 
Astroschema intectum, sp. n., Lyman (11 b), p. 235, pi. iii. figs, 59-61, off 
Havana, 175 fath.; arenosum, sp. n., id. ibid. pi. iii. figs. 62-64, Mexican 
Gulf, 804 fath. 
Astrochele, g. n., Verrill. “ Disk covered with small scales, above and 
below ; radial ribs well developed ; genital openings small, oblique, close 
to base of arms, at each end of a depression in edge of disk ; teeth and 
tooth-papillsB spiniform; mouth-papillae irregular, small or rudimentary, 
* Name preoccupied twice : for a genus of Crustacea (Claus), and for a genus of 
Fishes (Steindachner). 
