188 
There is an unusual abundance of extrinsic material on the surface of the polyps, e. g., 
Foraminifera, Sponge spicules, fragments of Polyzoa. 
This new species is marked by the following features: 
(a) the polyps are long and densely crowded; 
(b) the supporting bundle is either a mere basal peak, or relatively very short; 
(e) there is a strong contrast between the armature of the dorsal surface of the polyps and 
that on the ventral surface; 
(d) the branches or lappets of the polyparium are long tapering fingers, with nothing of the 
raggedness of S', spinosa , and much more substantial and compact than in S. longiramosa. 
The specimens come nearest S', semperi, but may be distinguished by the following features : 
(a) the supporting bundle is peculiarly weak, instead of being typically strong; 
{b) distinct points of 3 or more chrevroned pairs are developed dorsally, but are only occasionally 
observable ventrally ; 
(c) the polyp body is very long, and is strengthened by a larger number of smaller and more 
irregularly disposed spindles than in S', semperi. 
4. Studeriotes spinosa n. sp. (Plate VI, Fig. 11 ; Plate XIII, Figs. 3, 4 and 7). 
Stat. 47. Bay of Bima. 13 — 55 M. Mud with patches of fine coral sand. 1 Ex. 
Stat. 60. Haingsisi. 23 M. Lithothamnion in 3 M. and less. Reef. 1 Ex. 
Stat. 114. o 0 58'.5N., I22°55'E. 75 M. Hard sand, very fine. 4 Ex. 
Stat. 133. Lirung, Salibabu-isLand. Up to 36 M. Mud and hard sand. 1 Ex. 
Stat. 240. Banda. 5—20 fathoms and 9 — 36 M. Black sand. Coral. Lithothamnion-bank in 
18—36 M. 2 Ex. 
Stat. 285. 8° 39k i S., I27 0 4'.4E. 34 M. On the limit between mud and coral. 1 Ex. 
Four well-developed specimens from Station 114 require the establishment of a new species. 
The larger of the two has a much compressed, very spinose stalk, 11.4 cm. in height, 
from the top of which there projects a polyparium, partly protruded to a height of 2.4 cm. It 
consists of numerous very narrow branches (often 1.7 cm. in length), covered with polyps, whose 
strongly projecting supporting-bundles' produce a spiny appearance. The stalk is 1.6 cm. broad at 
its aperture and tapers to a broken base of 6 mm. It is much compressed from base to aperture, 
and shows a thickness of not more than 4 mm. — a great contrast to the spacious stalk of some 
other species, like Studeriotes mirabilis. The general colour of the colony is grayish brown. 
Each polyp stalk shows a very strong supporting-bundle of a few (about half a dozen) 
long spindles, some of which extend for almost the whole length of the stalk, about 2.6 mm. 
Towards the base of the stalk the supporting-bundle broadens out into two lateral fans of 
shorter spindles; at least two supporting-bundle spindles project prominently beyond the polyp. 
The polyp-head shows a heavy armature of chevron rows, about four pairs on each 
row. But those in the direct line of the supporting bundle are disposed rather longitudinally. 
The polyp-head is at right angles to the stalk. 
A specimen from Station 133 and a more weathered specimen from Station 47. The 
colour of both is grey brown. 
The specimen from Station 133 has a cylindrical involucre, standing 3.2 cm. in height, 
with an apical diameter of 1.2 cm. Through the mouth of the involucre there slightly project 
