307 



about 1 mm. in diameter. The siphonozooids are densely packed, and have 

 no definite arrangement. The smaller specimen is of a firmer consistence and 

 very few of the polyps are retracted. The siphonozooids are smaller but 

 e([ually numerous. 



The polyps are about (5 nun. in length and have a diameter of OTf) mm. 

 The tentacles are 1 nun. long. They are very broad and transparent, and have 

 two rows of about 15 pinnules on each side. The polyps are simply retracted 

 by well-developed muscles on the mesenteries so that the tips of the tentacles 

 are close together just under the circular aperture which is closed by a trans- 

 parent membrane. The position of the siphonozooids is marked by small cir- 

 cular openings covered by a hyaline film showing a radiate structure, evidently 

 the muscles which close the aperture. No trace of tentacles could be found. 



From the nature of the specimens it was impossible to ascertain the position 

 of the septa, but the same system of solenia was observed as in C. orientalis; n. sp- 



The spicules of the ti-unk are smooth and hyaline and show markedly the 

 lines of growth. The following are .some of the types with measurements in 

 millimetres : — 



{a) Capstan-like with narrow constriction or like two cones joined by their 

 apices, 0125 x 0025 ; 0-075 x 0025. 



(/>) Cylindrical with bifurcation at one end — some almost T-shaped, 

 0-25 X 0-125 ; 02 x 01 ; 015 x 0075. 



((?) Capstan-like with bifurcations at both ends, 0-3 x 01 ; 0125 x 005. 



(d) Capstan-like with three prongs at one end and two at the other, 

 0-3 X 0-125 ; 0-2 x 01 ; 0125 x 0075. 



(e) Capstan-like with four prongs at one end and two at the other, 

 0-3 X 015 ; 0-225 x 0-125 ; 01 x 0-05. 



(/) Some have an x-shaped marking dividing them into six rays, the middle 

 pair being very short (reminding one of the arrangement of the tentacles in an 

 Antipatharian polyp with the lowly inserted sagittal pair), 0-275 x 0-175 ; 

 0-15 X 005. 



This species is distinguished from C. (jiaux, Val., and C. liitkenU, Kolliker, by 

 the nature and length of the axis and also by the types of spicules. From 

 C. oriental is, n. sp., it is distinguished by the axis and in a less degree by the 

 spicules. 



The colour is creamy- white. 



Localities : Andamans, Marine Survey ; Orissa Coast. 



GENUS PARABELEMNON, n. 



An elongated and cylindrical Veretillid with the rachis longer than the 

 stalk ; autozooids distributed over the surface, the interstices covered with 



