I 2 



2. Sty laster bellus Dana. 



Allopora bella Dana. Zoophytes, p. 696. PI. LX, Fig. 6 and 6 a. Paumotu Archipelago. 

 Cyclopora bella Verril. Proc. Essex Institute. Vol. V, 1866 — 1867. Communications p. 38. 



Stat. 95. 5°43'-5 N., U9°4o' E. Off Sulu lis. 522 M. 3 specimens, one dry. 



Stat. 156. o°29'.2 S., 130 5.3 E. Off N.W. off New Guinea 469 M. 3 young specimens. 



Stat. 150. o° 6' N., 129 7'. 2 E. Djilolo Passage. 1089 M. 1 young specimen. 



These two last stations are close together, though the depth differs greatly. 



The largest specimens are those in spirit from Stat. 95, one is about 1 10 mm. wide 

 by 65 mm. in height and this piece is fairly intact. The diameter of the stem where it is 

 broken off at the base is 12 mm., the diameter of the axis of the terminal branches at their 

 bases about 2,5 mm. The cyclosystems are about 1,2 mm. The ampullae appear, at first, close 

 to the cyclosystems, later they spread all over the branches. 



The chief difference between Cyclopora bella and the specimens oi the Siboga collection 

 is (see Verrill) that the septa are joined together at their inner edges, to form a ring, in the 

 former, while this is the exception, rather than the rule in the latter (see Dana PI. LX, fig. 6a). 

 We do not regard this as important, as the fusion of the inner edges of the septa often occurs 

 in old colonies of other species and not in young ones, or at least not in the younger branches 

 of young colonies. 



3. Sty laster densicaulis Moseley. 



MOSELEY. Challenger Reports. Zoology. Vol. II. p. 57. PI. I, fig. 5. Off Rio de La Plata. 600 fms. 



Stat. 156. o°29'.2S., 130 5'.3 E. N.W. of New Guinea. 469 M. 1 Ex. 

 Stat. 177. 2°24'.5S., i29°38'.5E. N. of Ceram. 1300 — 1633 M. 1 Ex. 



The type specimens of this species were obtained by the Challenger in 600 fathoms 

 off the mouth of the Rio de La Plata in S. America. The two specimens from the Siboga 

 collection, which we refer to the same species, were found in closely situated stations in the 

 Malay Archipelago, one with a depth of 469 M. and the other 1300 — 1633 metres. If we 

 regard this as a deep sea species, the fact that it has only been found in such widely separated 

 localities as off the La Plata and off New Guinea is not an exceptional fact in the distribution 

 of deep sea corals. 



The largest colony, that from Stat. 177, is fairly intact and is about 45 mm. in height 

 and breadth. The branches have the sterns compressed in a plane at right angles to the plane 

 of the flabellum, even more markedly than in Moseley's specimens. Sometimes the branch 

 rises up into quite a sharp ridge; one branch is 5,7 mm. by 2 mm. in diameter. The base of 

 the main stem is 6,2 mm. by 5 mm. but in this case the longest diameter is in the plane of the 

 flabellum. The main stem is hollow. The cyclosystems are from 1 mm. to 1,2 mm. in diameter. 



4. Stylaster gemmaseens Milne Edwards & Haime. 



Milne Edwards et Haime. Histoire naturelle des Coralliaires, Vol. II, p. 130. Indian Sea. 

 P. M. DUNCAN. Trans. Zool. Soc. pt. 2, Vol. VIII, p. 332, PI. XLIX, fig. 1— 6, 8—10 and 

 13 — 15. North Atlantic. 530 fms. 



