62 



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

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

 verruca is composed of scale-like spicules arranged in rows and furnished with 

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

 base of the tentacular operculum. 



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

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

 Si^icules 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 witli the sides of the triangle. 



The general creneuchyma is thin and practically composed of large irregular 

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

 are somewhat longer and less scale-like. 



The spicules of the anthocodiae 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 verruese 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 l)ases which 

 are divided into several branched j^i'ominences, and a few irregularly branched 

 rods. The followino- measurements were taken of lenoth and l)readth in 

 millimetres : 



1. Plates, 0-95 X 0-6; 0-8x0-5; 0-75xO-4; 0-7x0-3. 



2. Discs, 07 X 0-6; 0-5x0-35; 0-5x0-3. 



3. Elongated triangles, 07x0 -5 ; 0-6xO-25; 0-5x0-3. - 



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

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



1. Flat bars, 0-8x0 -25 ; 07x0-2; 0-6x0-2; 0-4x0-1. 



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



3. Spindles, 0-7x0-12 across the arm, and 0"3 across the foliar expansion. 



0-GxO-l „ „ 0-25 



0-4x0-1 „ „ 0-2 



Locality : Station 284 ; T 55' N., ST 47' E. ; 50G fathoms. 



