G5 



As Studcr's Anthogorgia japonica has only a tentacular operculum, w<- <lo 

 not think that it should have been referred to Yen-ill's genus. 

 Locality : Andamaus ; 270-45 fathoms. 



Calicogorgia investigatoris, n. g. et sp. Plate IX. fig. 10. 



It is not without much hesitation that we have established this new genus. 

 The specimens on which it is based are difficult to deal with, and they seem to 

 belong to two species. In the form of the calyces and in the nature of the spiculcs 

 they approach Anthogorgia, somewhat vaguely defined by Verrill ; but in the 

 arrangement of the spicules on the verruca? and in the nature of the operculum 

 they are quite distinct. In some respects they suggest Muricella, but they are 

 separated by the nature of the spicules and the size of the polyps. We have there- 

 fore referred them to a new genus, Calicogorgia, probably related to Anthogorgia : 

 the principal differences between the two genera are stated in the following table : 



Anthogorgia, Verrill. Calicogorgia, n. g. 



Verrucse arranged in spirals. Verrucse lateral, with occasionally one or 



two on the other surfaces. 



Operculum composed of spicules em- Opercular spicules distinctly arranged 



bedded at various angles. in a crown and points. 



Spicules on the verrucse irregularly Spicules on the verrucse arranged in 



arranged. eight bands, each of two rows. 



Operculum may be inside the margin of Operculum forms a dome on the tip of 



the calyx. the calyx. 



The following diagnosis of Calicogorgia may be given : 



Colony branched in one plane, with polyps arranged principally on the lateral 

 surfaces of the branches. Branching irregular, but approximately alternate. 

 Verrucas prominent with spicules in eight bands and with a toothed margin. 

 Operculum a prominent cone, consisting of a crown and points. Spicules of the 

 ccenenchyma and of the verrucse are warty spindles either straight or curved. 



More detailed description of C. investigatoris. 



A greyish-white colony, with a faint tinge of pink, 97 mm. in height and over 

 100 mm. in width. A specimen in the littoral collection is 235 mm. in height, 

 205 in width, with an axis 3 '5 mm. in diameter near the base. 



The colony is branched in one plane. At a distance of 14 mm. from the base, 

 the main stem divides into two principal branches which give rise to the secondary 

 branches and twigs, the secondaries arising in a roughly alternate manucr. The 

 verrucse are arranged on the younger branches in a single linear series on the two 

 lateral edges, but here and there, especially on the older branches, they are present 

 9 



