82 



The general coeuenehyma is thin, lying evenly over the surface of the stem 

 and branches ; and also spreading over the barnacles, and giving rise to numerous 

 small polyps there. The surface has to the naked eye a smooth but arenaceous 

 appearance. Under low power it is seen to be continuously covered with the 

 glistening spherical heads of slightly projecting radially disposed reddish spicules. 

 The spicules include the following types : 



1. Long warty colourless spindles, 0-175x0-03 ; O'l2x0'03. 



2. Small warty reddish spindles, 0-08x0-02; '07x0 "02. 



3. Reddish single clubs, 0'055x0'03 (at the thick end). 



4. Reddish double clubs, 0-08x0-04; 0'06x0'035. 



This specimen belongs to the Nicella group of the Juucellas, but it differs 

 from Nicella in the arrangement of the polyps. It agrees, however, in the form 

 and termination of the verrucse, and in the fact that the verrucse arise at right 

 angles to the stem and then curve inwards. 



There are almost equal proportions of spindles and clubs. 



Locality: Andamans ; 120 fathoms. 



Scirpearella moniliforme, Wright and Studer. 



This species is represented by an unbranched fragment 88 mm. in length. 



The axis is very calcareous and brittle, 2 mm. in diameter. There are two 

 deep grooves on two opposite sides, and between them a number of smaller 

 grooves. 



The stem shows two marked furrows, caused by the two deep grooves on the 

 axis, dividing the polyp-bearing portion into two narrow bands. 



The polyps are arranged in four irregular rows, the members of which alternate. 



The ccenenchyma is very thin. Its spicules are either warty spindles, spiny 

 spindles, stars, or double clubs. The spicular measurements are nearer those of 

 S. gracilis, but in the shape of the spicules and in the marked grooving of the axis 

 and in the low verrucse our specimen comes nearest S. moniliforme, differing, 

 however, in having more than ten grooves on the axis. 



Locality : 8 miles west of Interview Island, Andamans ; 270-45 fathoms. 



Previously recorded from Amboina. 



Scirpearella alba, n. sp. Plate IX. fig. 15. 



Three incomplete specimens, white in colour, 281, 411, and 408 mm. in 

 length, with a corresponding diameter at the lower end of 175, 2'3, and 175 mm. 



T\vo of the colonies are unbranched, but the longest branches at a distance of 

 251 mm. from the lower end. 



The axis is cylindrical, hard, brittle, and very calcareous, but becomes flexible 



