22 



The quadriradiate forms are all marked by .in X-.-haped mark in the centre. 



This specimen differ- from the typical Suberogorffia kijllij;<-ri in havini 

 branching almost completely iu one plane, in the arrangement of the polyps on 

 the smaller branches, and in the smaller size of the spirul> 



Locality: Andamans; 270-45 fathoms. Previously recorded from Ceylon 

 and Zanzibar. 



Keroeides koreni, Wright and Studer. Plate I. figs. 6 and 7. 



A single specimen was obtained from the neighbourhood of the Andaman.-. 

 It measures 3'3 cms. in height, and has a maximum breadth of 2'9 cms. The 

 branches are few in number, and the white polyp-heads present a beautiful con- 

 trast with the bright vermilion red of the branch" 



Locality : Andamans ; 270-45 fathoms. 



Previously recorded from : " Challenger " Station 232, Hyalonema-ground, 

 off Japan ; depth, 345 fathoms. Also from Funafuti (Hiles) ; 40-90 fathoms. 



Keroeides gracilis, Wliitelegge. Plate IV. figs. 1, 2, and 3. 



To this species we refer a number of fragments from the vicinity of the 

 Andamans. 



As far as can be made out, the colony is branched in one plane, and has a 

 flat spreading basal attachment. The branches are given off for the most part 

 alternately, but this is not strictly adhered to. 



The axis is sclerogorgic, rigid, and dense, almost cylindrical in shape, without 

 any distinct traces of grooving. It is brownish-yellow in the older parts, becoming 

 paler in the younger. 



The polyps arise irregularly on the main stem and the larger branches, tend- 

 ing, however, to become arranged alternately on the smaller branches. They are 

 capable of complete retraction within the verrucae, and the tentacular spicules 

 form a low eight-rayed operculum. On the aboral surface of the tentacles the 

 spicules are arranged with their long axes parallel to the length of the tentacle. 

 The distance between adjacent verrucae may be 3 "5 mm., or they may be touching 

 one another. 



The verrucae are cylindrical, composed of warty spicules arranged longi- 

 tudinally, and vary in height from 1-2 mm., with a basal diameter of about 

 1 mm. 



The general ccenenchyma is thin, and consists of one layer of warty spicules, 

 which are arranged very irregularly, with -mall, brightly-coloured spicules filling 

 the apacee between. In the older parts of the .Mem and branches they are -mall 

 flat irregular disc- arranged transversely, with hei'e and there. e-pe<-ially near the 



