100 



in (liameter near the base. From tliifi point it tapers very quickly towards the 

 basal end, and becomes quite thread-like and liook-shaped. Towards the upper 

 end it tapers very gradually, and becomes almost completely cylindrical near its 

 junction with the portion contained in the rachis. 



On the lower part of the axis the coenenchyma is fairly thick, and is de- 

 veloped into four wing-like folds ; on the upper portion it is very thin, and closely 

 attached to the axis, Imt the wino-like folds can be traced almost to the beginning 

 of the rachis. 



The rachis seems to be radial in symmetry, its lower end forming a slender 

 inverted conical portion, on which no autozooids, but numerous siphouozooids are 

 found. 



The autozooids are long and slender, with the lower part packed with ova. 

 They are light in colour, and contrast with the dark bluish-l)lack colour of the 

 upper portion, which is almost certainly due to the decomposed contents of the 

 stomodseum. They are as much as 48 mm. in length by 3 mm. in width. The 

 stomodseum and gastric filaments usually extend for about 14 mm. In the upper 

 portion the stomodseum is slightly convoluted, but lower down it is merely 

 wrinkled. The tentacles are long, slender, and tapering, with one row of delicate 

 pointed pinnules on each side. 



The siphouozooids cover the whole surface of the rachis not occupied l^y the 

 autozooids. They are small projecting wart-like bodies, and in the parts not so 

 directly subjected to the action of the preserving fluid are slightly brownish in 

 colour. They are on an average 3 '2 mm. in height, and are slightly oval in 

 shape. 



No spicules are jsresent in polyps, rachis, or stalk. 



Locality : Andamans ; 238-290 fathoms. 



Umbellula, sp. ? 



The stalk is cylindrical, thin, 355 mm. in length. There is a distinct swelling 

 at the lower end, quadrangular in shape, with the edges prolonged into fine wing-like 

 portions. The length of this enlargement is G8 mm. Its greatest breadth from 

 the edges of the wings is about 2-5 mm., but tapers gradually at both ends, more 

 gradually at the upper than at the lower end. 



The stalk gradually tapers from the top of the enlargement, and varies in 

 thickness from 1 mm. to 0'8 mm. Towards its upper end it gradually thickens 

 and forms a plate-like structure continuous u'itli the rachis and flattened laterally, 

 thicker on the one surface than on the other, so that a cross section would appear 

 somewhat wedge-shaped. This portion of the stalk, together with the rachis, has 

 a hook shape in two specimens, but in the other two it is slightly curved towards 

 the dorsal side. About half-way up the stalk there is a peculiar l)end or knee in 



