II 



Specimens consisting of two fragments, probably from the same stem. The largest of 

 these includes the base of the colony consisting of large thin, plate-like calcareous lobes, but 

 one of which is complete. This is 2.6 cm. long. The fragment has an entire length of 26 cm. 

 The first internode above the base is the shortest, being 3.5 mm. long. The next is 1.7 cm., 

 the next 3.1 cm. the next 4.3 cm., the next 4.5 cm., and the remaining three gradually diminish 

 in size. The diameter at base is 3 mm., at distal end 1.5 mm. The longest horny node is the 

 third, which is 3 mm. long, and their length diminishes to the distal node which is 1.4 mm. 

 The surfaces of the internodes are marked by shallow longitudinal furrows. The other fragment 

 is nearly 18 cm. long, much more slender than the first, and the length of the internodes varies 

 from i cm. to 2.9 cm. The specimens are so mutilated that the arrangement of the calyces can 

 not be determined, further than that they appear to be borne on all sides of the stem. 



The individual calyces are excessively long and slender. It is possible that the specimen 

 has been dried at some time, and that the polyps have been shrivelled so as to be more 

 slender than they were originally. A typical calyx is 8 mm. long to the top of the marginal 

 spines, 2.2 mm. in diameter at margin, and i.i mm. at the narrowest part of the pedicel, near 

 the middle. There are a few slender, needle-like spicules on the proximal part of the calyx, 

 especially on the abaxial side, and a series of 8 very long, sharp smooth spindles with their 

 points projecting far beyond the margin, forming a crown of points. There are a few needle-like 

 spindles in the ccenenchyma near the polyp bases. Otherwise the ccenenchyma is rather leathery 

 and almost devoid of large spindles. But there are numerous comparatively minute bar-like 

 spicules near the surface of the ccenenchyma, and a few minute spicules in the tentacles. 



Spicules. These are long sharp needles, and small bar-like forms. The former sometimes 

 attain a length of 5 mm., and are usually sharp at both ends. Their surface is studded with 

 numerous small sharp thorn-like points. The largest of these needles form the marginal crown 

 of points. The bar-like forms in the coenenchyma are minute, rather short bars, with their ends 

 somewhat expanded and rounded. 



Color. The colony is ivory white (in alcohol), and the polyps are very light brown. 



General distribution. The type locality is off the Hyalonema Grounds, Japan, 

 343 fathoms. 



A comparison with polyps of the Challenger type shows that the Siboga specimens 

 have nore slender calyces, due probably to drying. The original description says that the 

 ccenenchyma is without spicules. These are minute, and might escape observation. 



2. Ceratoisis philippinensis Wright and Studer. 



Ceratoisis pliilippinensis Wright and Studer. Challenger Reports, the Alcyonaria, 1889, p. 27. 



Stat. 52. 9 3'-4 S., ii956'.7E. 959 meters. Globigerina ooze. 



Stat. 122. is8'.5N., 125 o'-5 E. 1264 1165 meters. Stone. 



?Stat. 173. 3 27' S., 131 o'.s E. 567 meters. Fine yellow grey mud. 



? Stat. 178. 2 40' S., I2837'.5E. 835 meters. Blue mud. 



Specimens consisting of two unbranched fragments, the longest being 13.6 cm. in length. 



