25 



The individual calyces are in the shape of a reversed horn or curved cone, the sum- 

 mit being curved upward and the opening being directed upward, or upward and a little 

 outward. A typical calyx measures 2.7 mm. in height and 2.8 mm. in diameter at base. Near 

 the distal end it has a diameter of 1.4 mm. and the walls on the distal portion show faint 

 indications of eight streaks of reddish against the lighter distal parts of the wall. The walls 

 are crowded with vertically disposed spicules, most of which seem to be tuberculate spindles. 

 The dorsal surfaces of the tentacles bear transversely disposed spindles. There are also short 

 stout spindles in the lower portion of the mesenteries, usually vertically placed. Very large 

 ova were found attached to four of the mesenterial filaments. 



A cross section of the stem shows a moderately thick coenenchyma. The axis cylinder 

 is much like that of Juncella, with a comparatively dense core showing but slight evidence, 

 of concentric lamellation, and an outer envelope composed of concentric layers of horny and 

 calcareous matter. The water-vascular canals are regularly disposed around the axis and their 

 walls are filled with stout double clubs. 



Spicules. By far the most common form is the densely tuberculate double head. Occa- 

 sionally these take the form of very stout crosses through longitudinal division of the heads. 

 The next most common form is the regular spindle, found mainly in the polyps themselves. 

 Sometimes these have regular whorls of verrucae, but they are usually stout, with irregularly 

 disposed warts. Clubs are rarely seen. 



Color. The colony is coral red, as are also the polyps. Other colonies are creamy white. 



General distribution. Type locality. Hyalonema Ground, off Japan, 345 fathoms. 



A large series of this species makes it possible to determine that the young specimens 

 may be of either color. In these the calyces are lateral and usually opposite. 



These intergrade with typical colonies, sometimes from the same station. Several spe- 

 cimens are slightly branched. 



2. Scirpearella gracilis Wright and Studer. (Plate VII, figs, i 5). 



Scirpearella gracilis Wright and Studer. Challenger Report, the Alcyonaria, 1889, p. 156. 



Stat. 58. Bay of Nangamessi, Sumba. Up to 36 meters. 



Stat. 166. 228'.5S., i3i3'.3E. 118 meters. 



Stat. 204. 42o'S., 1 22 58' E. 75 90 meters. 



rStat. 208. 539'S., I2212'E. 1886 meters. 



Stat. 260. 536'.5S., i3255'.2E. 90 meters. 



Stat. 274. 528'.2S., I3453'-9E. 57 meters. 



Stat. 289. 9 o'.3S., 1 26 24'.$ E. 112 meter?. 



Colony originally forked, but with one branch missing. 44.5 cm. in length. Main stem 

 to fork 4.4 cm. long, 3.5 mm. in diameter, and devoid of calyces. Main branch devoid of 

 calyces for 13.5 cm., 3.5 mm. in diameter near base and diminishing to 3 mm. near distal 

 end. There is a shallow but distinct groove running along one side of the colony, and that 



SIBOGA-EXPEDIT1E XIII 



