31 



Chrysogorg-ia indica, u. sp. Plate III. fig. G. 



This species is represented by a number of very incomplete fragments, which 

 present a striking appearance owing to the contrast between the white polyps and 

 the deep bronze of the axis. 



The axis is hard, brittle, and cylindrical. 



The branching in the fragments is dichotomous and very profuse. The 

 cylindrical polyps are of a beautiful white colour, and stand at right angles to the 

 axis. The base forms an inverted V, which passes down the sides of the axis and 

 almost meets at the other side. There is one polyp to each internode near the 

 younger portions ; in the terminal portions two may be present ; in the older 

 portions there may be two or three, and on one internode as many as four were 

 seen. The polyp spicules are arranged longitudinally and regularly. On the 

 aboral surface of the tentacles there is a baud of longitudinally arranged spicules. 



The ccenenchyma is very thin and membranous, and allows the axis to shine 

 through in all its length. 



The polyp spicules are spindles, straight or slightly curved, aud rounded at the 

 ends, or irregular flatfish rods. They have small tubercles on the surface, and 

 many of the larger forms seem smoother than the average, except that their edges 

 present a marked serration. The following measurements were taken of length 

 and breadth in millimetres : 



0-8x0-2; 0-6x0-13; 0-3x0-05 ; 0-25x0-02; 0-2x0-05 ; 0-16x0-02 ; 

 O-lxO-04. 



The spicules of the ccenenchyma are smaller than the polyp-spicules, but very 

 similar in shape and appearance. The following measurements were taken : 



0-35x0-05; 0-3x0-025; 0-3x0-05; 0-13x0-01; 0-12x0-02; 0-07xO-06; 

 0-06x0-02. 



Locality : Station 334 ; 6° 57' N., 79° 33' E. ; 568 fathoms. 



Family Isid.e. 



Subfamily Ceratoisidinse. 



Ceratoisis gracilis, n. sp. 

 Acanella rigida, Wright and Studer. 

 ,, rohusta, n. sp. 



Ceratoisis gracilis, n. sp. Plate VI. figs. G and 6a. 



This species is represented by several pieces, the longest of which measures 

 328 mm. 



The axis is cylindrical, and consists of horny nodes and calcareous internodes. 

 It is unbranched, long and slender, tapering gradually, aud only slightly flexible 



