PROF. THOMSON AND MR. MCQUEEN— REPORT ON THE ALCYONARIANS. a7 
polyp-bearing twigs are clustered. The p lyp-bearing twigs are in the form 
of catkins with a length of from 0°5 to 13cm. The basal catkins are stouter 
and more closely beset with polyps than the upper. 
A notable diagnostic feature is the presence of rows of closely aggregated 
small granular spicules in the tentacles, and continued on to the polyp-head 
and polyp-stalk. 
More spicules are to be found in the cortex of the stem than in the cortex 
of the main branches; consequently the stem is somewhat more rigid. 
The spicules of the cortex include spindles with large spines ; the spindles 
are sometimes curved, and the spines are in some cases longer on the convex 
surface ; there are also spindles with few warts, irregular spinose bodies and 
bicuspids, 2. e. with two prongs or cusps. 
The following measurements were taken of length and breadth in milli- 
metres -—— 
Spimose spindles: 0:72x0-2; 055x013; 0:52.01; 0:-45x0-1 ; 
0:37 X0:12 ; 0:33 015; 0°29 x 0-12. 
Spindles with few warts: 0°42x 0-05; 0°375 xO:1 ; 0°37 x 0:1 ; 0°35x 
OTS ¢ CPD SOP 3 O29 SOs) 3 Weta seOril s O23 << O0k, 
Bicuspids : 0°47 x 0°275. 
The canal walls contain highly spinose spindles, spindles with small warts, 
highly spinose club-shaped bodies, irregular spinose bodies, and bicuspids. 
The following measurements were taken of length and breadth in milli- 
metres :— 
Highly spinose spindles (the spines being larger on the convex side) : 
OS2¢ 012 2p Oe x OO 3 Oar Onli 3 Oss Oil e Ora sal 2 
03x O15. 
Spindles with small warts: 1:02x0°22 ; 0°95x02; 0°85 x0-175 ; 
Ob Ole s Osa s<Orl 
Highly spinose club-shaped bodies : 0°32 x 0:15; 0°275 x 0175. 
Bicuspids : 0°42 x 0°175. 
Mr. Crossland notes that the specimen appeared whitish under water, pale 
brown when brought up. 
Locality.—From a depth of three or four feet in the Coral-reef of 
Khor Delaweb. 
LItHOPHYTUM MACROSPICULATUM, n. sp. (Plate 8. figs. 2 & 3.) 
From a stem rather less than 1 em. high, with a breadth of 2°5 cm., 
three primary branches take origin. One of these, after a course of half a 
centimetre, divides dichotomously into two branches of 4 and 5 cm. in 
length respectively. The other primary branches are 6 and 4 cm. in length. 
Polyps are not borne either on the main stem or on the main branches, but 
