108 



mulliporous rosette-plates, which serve as connection with the zooecia in the 

 second layer, and are convex towards these (fig. 1 c). 



The avicularia which Hi neks wrongly gave as membranaceous do not seem 

 to occur on all zooecia, but are in most cases represented by two. We can occa- 

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

 surface of the lower zooecium, but to the proximal end of the higher. 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-shaped lucida 

 (fig. 1 e). 



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

 striation, provided with an uncalcified ectoocecium and very low. They are how- 

 ever somewhat higher when seen from the basal surface. 



The Ctenostome layer consists of quite uncalcified, elongated hexagonal zooecia 

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

 an Alcyonidium. 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-up 

 zooecia 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 Chaperia 

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

 richly furnished with ooecia, were quite covered with the layer of uncalcified 

 zooecia, and as the basal surface of the other zooecial 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 quite 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 zooecia in their distal half. 



Bugularia nov. gen. 



The distal wall angular with two multiporous rosette-plates; the ooecia free; 

 avicularia sessile, not pedunculate. 



