Deep-Sea AJcijonnria from the radian Ocean. ool 



ycllowisli and tapers to a thread-like fineness ; the branches 

 are disposed in a spiral and the axis is somewhat zigzag ; 

 the polyps are distant, usually only one on a node, in some 

 parts all on one side, in other parts in an apparent spiral 

 arrangement ; the polyp-spicules lie parallel to the long axis 

 of the polyp except at the base, where they take an oblique 

 direction and finally run parallel to the stem ; the superficial 

 spicules are short rods, rounded at the ends, and bearing 

 very minute rough points; besides these there are quadri- 

 radiate spicules with an X-shaped marking, and a number 

 of minute spherical spicules with relatively long projecting 

 spines. 



Locality. Station 2il, GOG fatli. 



Family Isidse. 



Ceratoisis pnlm(e, Wright & Studer. 



Two fragments which agree in every respect with the 

 description given by Wright and Studer. 

 Locality. Andaman Sea, 500 fath. 



Acanella riyida, Wright & Studer. 



A complete bushy colony, with branches in verticels of 

 of two, three, or four, with prominent rigid polyps covered 

 with fusiform spicules. 



Locality. Laccadive Sea, 703 fath. 



Primnoisis alba, sp. n. 



The basal portion is a broad calcareous plate ; the axis 

 with its alternate horny and calcareous joints is longitudinally- 

 grooved ; the branches are given off from the calcareous 

 internodes and begin w ith a horny node ; the coenenchyma 

 is thin and creamy white ; the low^ roughly conical verrucae 

 occur in fours either in a spiral or in a whorl; the spicules 

 are irregular flat disks and rods witli numerous prominent 

 warts. 



Locality. Andamans, 270-45 fath. 



Family Primnoidae 

 Primnoa EUisii, von Koch. 



This beautiful species, described by von Koch from near 

 Naples, also found by Herdman off Ceylon, was obtained by 

 the 'Investigator' at the Andaman Islands (270- JS fath.) — 

 a wide and interesting geographical distribution. 



