94 



ends, with minute tubercles mi the surface. The ends have a peculiar 

 shattered or unfinished appearance. 

 The following measurements were taken of length and breadth in millimetres : 



1. 0-14x0-04; 0-12x0-035. 



2. 1-5x0-15; 0-95x0-125; 0'3x0'05. 



The spicules of the coenenchyma at the lower end of the stalk are short blunt 

 rods or longish ovals. In addition there are several quadriradiate forms with a 

 distinct X-shaped marking at the junction of the rays, as if the rays were dove- 

 tailed into one another. There are also a few four-cornered forms with an X-shaped 

 mark. The surface of the rods is covered by small spine-like tubercles which are 

 disposed in longitudinal rows and give the peculiar ribbed appearance. The 

 measurements, taken as above, are as follows : 



1. Kods, 0-14x0-04; 0'125xO-035; 0'115x0'04; O'lOxO'04. 



2. Quadriradiate and four-cornered forms, "08x0 "08 ; "06x0 "05. 

 Locality : Station 315 ; 10 06' N., 92 29' E. ; 705 fathoms. 



Umbellula intermedia, n. sp. 



The stalk is 220 mm. in length, slender and flexible, quadrangular in 

 section, with a small enlargement at the very base and a long spindle-shaped 

 enlargement a little above this. It has a maximum diameter of 1"2 mm., and 

 is about 0"75 mm. in width at its narrowest part. The axis is quadrangular in 

 section, with a groove on each side. 



The rachis is distinctly bilateral and bears five autozooids, one terminal and 

 two lateral on each side. It is ovoid in shape, and marked on the prorachidial 

 surface by a ridge formed by the end of the axis which runs up to the terminal 

 autozooid. 



The autozooids are of medium length, with short bodies and long tentacles. 

 They are rigid, and stand out stiffly from the rachis. The length of the body is 

 3'3 mm. and the tentacles have a length of 8 "5 mm. On the body of the auto- 

 zooid and the aboral surface of the tentacles there is a coating of spicules visible 

 to the naked eye. 



The siphonozooids occur all over the rachis, with the exception of the ridge on 

 the prorachidial surface. They are small, and occur in small meshes in the spicular 



covering. 



The coenenchyma of the stalk, the superficial layer of the rachis, and the 

 surfaces of the autozooids and tentacles are densely packed with whitish spicules 

 visible to the unaided eye. 



The spicules of the rachis and autozooids are rough rods or bars, blunt at the 

 ends and ribbed. They vary from 0'15-0'35 mm. in length and from 0'015-0'03 

 mm. in width. 



