134 
seula Lütk., A. neapolitana Sars) und Ophiopholis A. Ag. 
(mit Amph. cordifera Lym. — A. elongata Lütk.) abge- 
trennt. 
Die Diagnosen der neuen Gen. lassen wir hier folgen: 
Ophioceramus Lym. Disk covered with radial shields and 
stout scales, none of which are surrounded by a belt ofsmall ones. 
Over the base of each arm a small noteh in the disk. Genital sca- 
les concealed. Teeth. Tooth-papillae. Mouth papillae. Side mouth- 
shields small and not meeting within. Arm-spines arranged along 
the outer edge of the side arm - plates. No supplementary pieces 
to te upper arm-plates. Two genital slits, beginning outside the 
mouth-shields. 
Ophiozsona Lym. Disk covered with radial shields and stout 
scales, each larger one, above, being surrouded by a belt of smaller 
ones. Over the base of each arm a small notch in the disk. Ge- 
nital scales thick and conspiceuous. Teeth. No tooth-papillae Mouth- 
papillae. Side mouth-shields wide and nearly or quite meeting 
with in. Arm-spines arranged along the outer edge of side arm-pla- 
tes. No supplementary pieces to the upper arm-plates. Two genital 
slits, beeinning at the sides of the mouth-shields. 
Ophiophragmus Lym. Disk small and delicate, furnished 
with uncovered radial shields and covered with naked scales; the 
scales along the edge of the disk are turned up, so as to make a 
little fence. Teeth. No tooth-papillae. Six mouth-papillae to each 
angle of the mouth. Arms slender, even, more or less flattened. 
Arm-spines short and regular, arranged along the sides of the side 
arm-plates. 
Ophiocnida Lym. Disk small and delicate, furnished with 
uncovered radial shields; its coat of naked, overlapping-scales, is 
beset with small thorns. Teeth. No tooth-papillae. Six mouth-pa- 
pillae to each angle of the mooth. Arms slender, even, more or less 
flattened. Arm-spines short and regular, arranged along the sides 
of the side arm-plates. Two genital slits to each interbrachial space. 
Hemipholis A. Ag. Disk, above, covered with rounded, 
rather thick scales, and with large radial shields; below nacked. 
At the base of each arm disk sliehtly indented. Teeth. No tooth- 
papillae. Two mouth-papillae to each angle of the mouth. Side 
mouth-shields touching each other, so as to from a continuous ring 
round. the mouth. Three short tapering arm-spines. Two genital 
slits, beginning outside of the mouth-shields. 
In Betreff des Gen. Ophiocoma Ag. hebt Verf. hervor, dass 
Oph. bidentata und Oph. Nilssonii M. et Tr. kein Artenrecht zu be- 
