lO.S 



niultiporous roselte-plales, which serve as conneclion with the zou-cia in the 

 second hiycr, and are convex towards Ihese (fig. 1 c). 



The avicularia wliich Hi neks wrongly gave as niemhranaceous do not seem 

 to occur on all zoa'cia, hut are in most cases represented l)y two. ^^'e can occa- 

 sionally find 4. They are not, as represented by Hi neks, attached to the basal 

 surface of the lower zocx'cium, hut to the proximal end of the liigher. Each 

 lateral edge namely sends out a narrow prolongation directed inwards, to which 

 the avicularia are attached, and at the place of attachment of each avicularium 

 we find a small uniporous rosette-plate. The avicularia are conical or club- 

 shaped with a straightly cut frontal area, and the operculum, which is broadly 

 chitinized in the margin, has in its proximal part a half-moon-sha|)ed lucida 

 (fig. le). 



The ooecia which up to the present have been overlooked, are free, without 

 slrialion, provided with an uncalcilied ectoocecimn and very low. They are how- 

 ever somewhat higher when seen from the basal surface. 



The Ctenosloiite luycr consists of quite uncalcified, elongated liexagonal zotccia 

 with a two-lipped aperture, and they are in all respects much like the zoa-cia in 

 an Alcijonidiuni. I can give no information about the rosette-plates, as I have only 

 examined dried colonies, and it was only after moistening these that the dried-uj) 

 zoix'cia of this layer showed their real nature. I have twice received material of 

 this species from Miss Jelly, once a large colony labelled South Africa, and an- 

 other time a number of fragments together with small colonies of CJutju'rid 

 copensis, labelled Port Elisabeth. All these specimens, of which the last were 

 richly furnished with ooi'cia, were quite covered with the layer of uncalcilied 

 zoo-cia, and as the basal surface of the other zoa'cial layer is at the same time 

 richly furnished with rosette-plates, I have no doubt that the two layers really 

 belong together; but it would be very desirable to make an examination of 

 fresh material in order to determine this (juite unique dimorphism with cer- 

 tainty. 



The colonies are foliaceous with slightly lobate margin, attached by a dense 

 mass of radical fibres, which in the Cheilostome layer arise from the margin of 

 the zocrcia in their distal half. 



Bugularia nov. gen. 



The distal wall angular with two niultiporous rosette-plates; the oo'cia free; 

 (whuliivia sessile, not peduiu-iilnte. 



