BULLETIN OF THE 
OPHIOCAMAX* gen. nov. 
Disk beset with thorny spines or stumps, and covered by seales or irregular 
plates and large radial shields. Besides teeth, there are tooth-papille and 
mouth-papille, numerous, and all of the same spine-shape ; they are arranged 
in tufts on the mouth-frames and jaw-plate. The spiniform scales of the mouth- 
tentacles are borne on the edge of a little supplementary plate in a way similar 
to Oplvioglypha. Numerous (9) thorny translucent arm-spines, arranged along 
the sides of the side arm-plates, which are prominent, and meet nearly or 
quite above and below. In each interbrachial space two genital openings, 
which begin close outside the mouth-shield. 
OPHIACANTHA, 
TABLE OF SPECIES HEREIN DESCRIBED. 
Four arm-spines, Disk minutely tubercu- 
lous. 
Disk closely beset with grains A 
Y ری‎ | Seven slender translucent arm-spines. Some 
0. tuberculosa. 
Mee aio. AA Arm- 4 smooth spines on disk. O. vepratica. 
quu epe nene Outbr ends of radial shields O. granulosa. 
Disk closely beset with short, smooth, stout spines, sometimes mingled with | û, rosea, 
grains, Eleven thorny arm-spines. Radial shields covered. j 1 
Disk beset with small short stumps, or grains, bearing a crown of blunt thorns. 0. man. 
Six arm-spines, stout, opaque, and searcely thorny. Slender tentacle-scales. st jo. 
O. sentosa. 
with thick skin. Arm-spines scarcely or not at 
all thorny. One minute short tentacle-scale. 
Disk-spines simple. Arm-spines not thorny. 
One or two large long tentacle-scales 
Spines of disk and arms slender and ۰ 
cent. Arm-spines not thorny. Some thorny 
stumps on disk. 
Disk beset with short slender 0. stimulea. 
spines, ۹ 
Disk-spines with forked heads, and rae a 
J 
jo segesta, 
Disk beset with stout spines ; Arms essentially smooth, and about twelve times di- O. Troschelt. 
ameter of disk. Radial shields partly naked, and making narrow radiating ridges. A 
About eleven mouth-papille to each angle. Large tentacle-scales araia ++ 0 cuspidata, 
Seven mouth-papille to each angle. Slender spiniform tentacle-scales ۰ 0. longidens. 
Seven mouth-papillo, High disk-stumps, with thorny sides and ends. Arm- jo modoses 
spines feebly thorny. Six arms. h ^ 
The lowest arm-spine thickened and curved ۳۵ US ME 0. cornuta. 
Eight or more feebly thorny arm-spines. Side arm-plates very prominent. Disk- } O, cósmica 
^rochets rather stout. 
Arm-spines very long, not thorny. Side arm-plates large and swollen. Outer jo levispina. 
side of under arm-plates strongly curved 
Disk beset with minute grain-like stumps, bearing a crown of blunt thorns. 
Arm-spines long, slender, translucent, 0. 
arm-plates, which meet above. 
thorny ; mounted on very projecting side serrata, 
* dois, snake ز‎ kápal, stake. 
