— 20 — 
hey are high, furnished with a coronal fillet of long acute spicules, 
which are the largest spicules in the cells. The polyps retractile, 
cylindrical, smooth, about i mm. long; the tentacles about 0.5 mm. 
long, thick. The coral abound in spicules, very aculeate and nodular. 
In the sarcosoma the spicules have the form of pointed spindles, 
most frequently curved. The cells are furnished with furcate spi- 
cules, which are the most aculeate and nodulous of all the spicules 
in the coral. With the exception of the coronal spicules the spi- 
cules in the cell are smaller than those in the sarcosoma. The spi- 
cules in the posterior part of the polyp are like those in the sarco- 
soma. The largest spicules pertaining to the coral are situated in 
the anterior part of the polyp, which is principally furnished with 
long, curved spindles and straight clubs. The least nodulous and 
aculeate spicules are those in the polyps. At some distance below 
the tentacles there is a stripe of transversal spicules, from this stripe 
to the base of the tentacles the spicules are situated lengthwise in 
eight rows, otherwise the spicules are dispersed all over the polyp. 
The aboral surface of the tentacles abound in transverse spicules, 
from the base to the extremity. Axis round, non-calcareous, cor- 
neous, 0,3 mm. thick in the branches, yellowish-brown in the trunk, 
in the smaller branches more inclined to yellowish- white. The coral 
white, pellucid. This species is allied to Paramuricea borealis Verrill. 
Protoptilum tortum n. sp. 
Tab. VII flg. 19, 20, Tab. VIII fig. 1—3. 
Small. Rachis, longer than the stalk. The stalk is, in the upper 
end, as broad as the rachis (2 mm. broad) and becomes produced 
into a little oblong terminal bulb (4 mm. broad). In the dorsal side 
of the stalk there is, from the rachis to the middle of the stalk, a 
single row of small pointed papillæ. From the base the rachis is 
sinistrally twisted. The polypcells on the flattish dorsal surface si- 
tuated in slooping series, proceeding from side to side. In each 
series there are 2 — 4 cells. The cells are 2 — 3 mm. long, thick, 
broad, cylindrical, the free margin is furnished with an extremeiy 
minute papilla. The innerwall of the cell is, as usual, concreted 
with the rachis. The polyps are cylindrical, retractile, without spicules, 
smooth, about as long as the cell with very long tentacles, having 
1 5 pairs of pinnula. In the mesial part of the aboral surface of the 
