62 



The verrucse are prominent, almost cylindrical, at right angles to the surface, 

 about 2'3 mm. in height, with a basal diameter of 1'5 mm. The wall of the 

 verruca is composed of scale-like spiculcs arranged in rows and furnished willi 

 blunt projecting points. The tips of the rows form eight points encircling the 

 base of the tentacular opcrculum. 



The anthocodise are not capable of complete retraction ; the tentacular part 

 when in rest lies on the top of the verruca and forms a conical operculum. The 

 spicules are arranged in a crown and points. The crown consists of a ring of 

 transverse spindles three deep ; each point forms a triangle, the sides of which are 

 formed by two large spicules with the basal ends diverging in golf-club fashion 

 and resting on a spicule shaped like an inverted U. In nearly all the points there 

 is a third spicule in close connection with the sides of the triangle. 



The general coanenchyma is thin and practically composed of large irregular 

 imbricating scales. In the younger parts of the branches the coenenchynm spicules 

 are somewhat longer and less scale-like. 



The spicules of the anthocodiaa are spindles, straight or curved, with spiny 

 projections. They vary in length from 0'2 to 0'8 mm., and in width from 0'03 to 

 0'06 mm. 



The spicules of the verrucas are irregularly shaped plates with a projecting 

 spine, irregular discs whose surface is covered by papillte and whose edges are 

 divided into branched protuberances, elongated triangles with broad bases which 

 are divided into several branched prominences, and a few irregularly branched 

 rods. The following measurements were taken of length and breadth in 

 millimetres : 



1. Plates, 0-95x0-6; 0'8x0'5; 0'75x0'4; 07x0-3. 



2. Discs, O'ZxO'G ; 0-5x0'35; O-SxO'3. 



3. Elongated triangles, 0-7x0-5 ; 0-6x0'25; 0'5x0'3. 



4. Rods, 0-6x0-17; 0'5xO'll. 



The spicules of the general coenenchyma are flat bars, irregular discs, and 

 spindles with a large foliar expansion on one side. All are covered by rough warty 

 papillse. Their measurements, taken as above, are as follows : 



1. Flat bars, 0-8x0-25 ; 07x0'2; 0'6x0'2; O^xO'l. 



2. Irregular discs, 0-6x0-4; 0'4x0'26; 0'4x0'2; 0'3x0'25. 



3. Spindles, 0"7xO"12 across the arm, and 0"3 across the foliar expansion. 



0-6x0-1 0-25 



0-4x0-1 0-2 



Locality : Station 284 ; 7 55' N., 81 47' E. ; 500 fathom,-. 



