OPHIUKID^. 
Ech. 9 
Ophioceramis (?) clausa, sp. n., Lyman (11 a), p. 124, pi. vi. figs. 161-163, 
630 fafch., and ? obstricta, sp. n., id. ibid. pi. vi. figs. 164-166, 129 fath., 
Eastern Seas. 
Ophiozona stellata, sp. n., Lyman (11 a), p. 125, pi. vi. figs. 147 & 148, 
Eastern Seas, 700-1100 fath.; insularia, sp. n., id. ibid. p. 126, pi. vi. 
figs. 149-151, Fiji Islands, 310 fath. ; antillarum, sp. n., id. ibid. p. 127, 
pi. vi. figs. 152 & 154, West Indies, 450 fath. ; depressa, sp. n., id. ibid. 
p. 128, pi. vi. fi^s. 155-157, Eastern Seas, 500 fath. ; tessellata, sp. n., id. 
(10 b), p. 223, pi. iii. figs. 43-45, 242 fath., and P dubia, sp. n., id. ibid. 
p. 224, pi. ii. figs. 19-21, 539 fath., Gulf of Mexico. 
AmpMura tumida, sp. n., Lyman (11 B), p. 225, pi. ii. figs. 28-30, 321 
fath., cuneata, sp. n., id. ibid. pi. ii. figs. 34-36, ibid. 339 fath., and lunaris, 
.sp. n., id. ibid. p. 226, pi. ii. figs. 31-33, 955 fath.. Gulf of Mexico. ' 
Ophiocnida abnormis, sp. n., Lyman (11 b), p. 227, pi. ii. figs. 37-39, Gulf 
of Mexico, 101 fath. 
Ophiotrochus, g. n., Lyman. “Disk flat, covered with thin more or less 
granulated scales and naked radial shields ; arms slender, each joint con- 
stricted at its base ; side-arm-plates meeting widely above and below ; 
upper arm-plates rudimentary ; scale of second pair of mouth-tentacles 
lying between side-mouth-shield and outer mouth-papillae ; teeth; mouth- 
papillae ; no tooth-papillae ; smooth arm-spines on outer edges of side- 
arm-plates.” 0. paniculus, sp. n., id. (11a), p. 129, pi. vi. figs. 158-160, 
Eastern Seas, 1070 fath. 
Ophiophyllum, g. n., Lyman. “ Disk extremely thin, flat, covered with 
scales and large radial shields, bordered by a row of movable plates, 
attached by their inner margins ; mouth-papillae in a close row ; teeth ; 
no tooth-papillae ; arm-spines thin and broad, on outer edge of side arin- 
plate.” 0. petilum, sp. n., id. (11 a), p. 130, pi. vii. figs. 179-181, Eastern 
Seas, 270-600 fath. 
Ophiobyrsa, g. n., Lyman. “ Skin thick, hiding the underlying plates, 
beset on the disk with spines ; arms nearly cylindrical ; side arm -plates 
projecting as short flap-like spine-ridges, bearing slightly rough spines on 
their outer edge ; tentacles, large, simple ; few or no mouth-papillae ; 
teeth and tooth-papillae represented by a clump of little spines.” 0. 
rudis, sp. n., id. (11a), p. 131, pi. viii. figs. 198-200, Southern Seas, 38 
fath. 
Ophiochiton, g. n., Lyman (allied to Ophiarachna). “ Disk covered with 
fine imbricated scales and small radial shields ; numerous sharp mouth- 
papillae ; teeth ; no tooth papillae ; upper and under arm-plates about as 
broad as long, separating the side-arm plates, which project slightly and 
are rather small ; under arm-plates with a median longitudinal ridge ; 
arm-spines slender and smooth, on the sides of the side-arm-plates, near 
the outer edge ; genital openings long.” 0. fasti giatus, sp. n., id. (11 a), 
p. 132, pi. vii. figs. 182 & 183, Eastern Seas, 310 fath. 
Ophiopyren, g. n., Lyman (allied to Pectinura). “ Disk granulated ; 
teeth ; no tooth-papillae ; numerous close-set mouth- papillae ; mouth-frames 
long and conspicuous ; side-mouth-shields small, widely separated by the 
mouth-shield ; under arm-plates divided in two parts ; arm-spines on 
outer edge of side-arm-plates.” 0. brevispinus, sp. u., id. (11a), p. 133, 
