90 



like lower portion of the autozooids. They are quite smooth and regular in outline, 

 minute ovoid discs with a slight waist in the middle. l\Iany suggest small double 

 dinner-rolls. Those measured were 0"05 mm. in lenoth and 0"03 mm. in breadth. 

 Locality : Station 246 ; 11" 14' .SO" N., 74° 57' 15" E. ; 68-148 fathoms. 



Bathyptilum indicum, n. sp. Plate VII. fig. 4. 



The specimen is broken into two pieces which make a total length of 118 mm. 

 It consists of a rather long stalk and a shorter rachis, and is club-shaped apart from 

 a large globular enlargement at the lower end of the stalk. The general colour is 

 grey, with a pinkish tint more marked in the rachis and tentacles. 



The stalk is long, and gradually increases in width towards the upper end. 

 Its lower end bends at an angle of almost 90° with the main part, and bears 

 terminally a large thin-walled globular enlargement. On its thin walls there are 

 several white bands of minute white spicules. 



The axis is sub-cylindrical, its fiattened surface making it almost cjuadrilateral. 



The rachis increases in size until near the tip, where it begins to taper. It 

 ends, however, in a blunt point. The autozooids are arranged on the metarachidial 

 and pararachidial surfaces, leaving the proraehidial surface with a broad free space. 



There are five fully developed large autozooids and one or two smaller. They 

 are large with long tentacles, and are slightly directed towards the tip of the 

 rachis. They are 7 mm. in length, and the tentacles are slightly longer (8-9 mm.). 



Small siphonozooids occur over all the surface of the rachis not occupied by 

 autozooids. They project a little above the surface, and have their apices directed 

 slightly towards the tip of the rachis. 



At the base of the rachis there is a slight spindle-shaped enlargement contain- 

 ing reproductive bodies. 



The general coenenchyma of the stalk and rachis is thick, and has a granular 

 appearance owing to the presence of abundant spicules. 



The spicules are long slender fiuted rods, with blunt ends which show a 

 peculiar tooth-like arrangement when examined under a high power. The follow- 

 ing measurements were taken of length and breadth in millimetres : 



0-33 X 0-028; 0-28 x 0-02; 0-14x0-02. 



This species differs from Bathyptilum carpenteri, Kolliker, in the following 

 points : 



1. In having slightly smaller spicules, though the whole colony is larger; 



2. In the arrangement of the siphonozooids ; 



3. In having a large bladder at the end of the stalk ; 



4. In having fewer autozooids ; 



5. In the size of the axis, which has a diameter of I'OS mm. 

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



