Stat. 51. Madura Bay and other localities in the southern part of Molo Strait. 691091 meters. 



Fine grey sand, coarse sand with shells and stones. 

 Stat. 114. o58'.5N., i2255'E. 75 meters. Hard sand, very fine. 

 Stat. 117. io'-5 N., 122 56' E. 80 meters. Sand and coral. 

 Stat. 162. Between Loslos and Broken Islands, West coast of Salawatti. 18 meters. Coarse 



and fine sand with clay and shells. 



Colony complete with the exception of the basal end of the stem, 44.5 cm. high. The 

 stem is unbrached for 16 cm. of its length and its basal portion has been worn or cut away 

 on one side so as to give it an appearance of being flattened although it is otherwise nearly 

 round, i cm. in diameter, with a channel or groove on one side and a number or longitudinal 

 irregular corrugations on its surface. The stem forks 1 6 cm. from its base into two rather unequal 

 branches. One of these is gutter-shaped throughout, being convex on its dorsal and concave on 

 its ventral aspect, with the exception of one "girdle" 1.5 cm. broad. The other, and larger, 

 branch is solid and round in section for 6.5 cm. from the base, beyond which it is alternately 

 guttered and partly girdled, the girdles in places being so extensive as to form long tunnels 

 or arcades, in one case 4.1 cm. long. Both of the main branches give off numerous lateral 

 branchlets which are greatly expanded basally and curve forward and then inward to meet and 

 coalesce, thus forming the girdles or arcades. The branches bear many simple and a few 

 compound branchlets alternately disposed. All of the ultimate branchlets are much flattened 

 and more or less guttered, the guttering sometimes disappearing on the distal ends near which 

 the twigs have a cross section of about 3.5 mm. X i-7 mm. 



The calyces are practically all lateral in position, being usually in fairly regular rows 

 along the edges of the branches and branchlets. There are also a few groups of scattered 

 calyces on the front surfaces of the girdles and arcades. 



The individual calyces are very low conical verrucae, a typical one measuring 1.2 mm. 

 in height and 2 mm. in diameter at the base, and are from 2 to 3 mm. apart from centre 

 to centre. Their walls are filled with vertically disposed spindles which tend to form 8 low 

 marginal points which are much more evident than in Solenocaulon sterroklonium. The polyps 

 are retractile, but in the specimen described stand as much as 2 mm. above the calyx margin. 

 The basal part of the polyp body is armed with transverse spicules which higher up are en 

 chevron and still higher lie in vertical bands, 8 of which surround the margin and encroach 

 upon the tentacle bases. The distal parts of the tentacles are covered with a complete armature 

 consisting of two series of delicate spicules with serrated edges, the series meeting on the 

 mid-dorsal surfaces of the tentacles and extending obliquely forward, outward and downward, 

 ending in a line \\ith the bases of the pinnules. The polyp spicules are lighter and more jagged 

 than those of 5. sterroklonium^ and the polyp seems more slender and delicate. 



A cross section of a stem shows an outer layer of comparatively heavy and disk-like, 

 sometimes almost globular, spicules covered with coarse verrucse. The water-vascular canals are 

 around the periphery of the axis and appear in section as regular oval openings. The axis is 

 a felted mass of slender rod-like and needle-like spindles whose surfaces bear short thorny spines 

 which are more prominent and numerous than in S. sterroklonium. The ccenenchyma of the 

 branches is filled with rather slender spindles which intergrade on the one hand with rod-like 



