294 Rev. T. Hincks's Contributions towards a 



except by examining the younger cells. In few species is the 

 line of separation between the two portions of the operculum, 

 the movable lid and the fixed plate which closes the sinus 

 more strongly marked. The latter is thick and prominent. 



The ooscium is remarkable for its small size and its very 

 slight elevation. The surface is glassy and entire. In the 

 one or two examples which I have seen there is an appearance 

 of immaturity. 



Schizoporella pectinata, Busk, sp., form Africana, nov. 

 (PL VI. fig. 6.) 



Zoariwm erect, bilaminate, compressed, divided into wedge- 

 shaped segments, with lobate margin. Zocecia pyriform, 

 small, convex, divided by distinct sutures, disposed obliquely 

 in lines, front wall thickly covered with small punctures, in 

 the older cells more or less obliterated ; a line of rather larger 

 perforations round the margin, frequently a smooth polished 

 tubercle towards the lower part of the cell and an avicularium 

 in the same region, the adult cells surrounded by a thickened 

 border ; primary orifice arched above, with a wide sinus 

 below, tapering off to a rounded point, peristome raised ; 

 secondary orifice elliptical or semicircular, lower margin 

 straight, within it a small pectinated ridge, at a short distance 

 below it a roundish opening, formed by a bridge-like struc- 

 ture, which crosses the orifice (between the suboral avicularia) 

 and shuts off the lower portion of it ; on each side immedi- 

 ately below the orifice a raised avicularium, with pointed 

 mandible ; groups of larger cells (ocecial) principally along 

 the margin of the zoarium, very prominent and massive, with 

 the orifice much elongated transversely and very narrow 

 between the upper and lower margins ; large avicularian cells 

 (replacing zocecia) with pointed mandible, apex incurved, in 

 lines along the outer edge of the zoarium. 



Hob. Attached to the stems of Hydroida. 



Loc. Port Elizabeth, South Africa (Miss Jelly) ; off Cape 

 York, in 8 fathoms, coral-mud (Busk, l Challenger' Hep.). 



I refer the South-African form to Busk's species with 

 some doubt. The figure of Adeonella pectinata in the 

 1 Challenger ' Report differs not a little from the present 

 form. The " wide punctures " on the front wall which, as 

 represented, are few in number, contrast strongly with the 

 numerous minute punctures which cover it in the South- 

 African species. The shape of the cells too differs, and the 

 total absence of the suboral avicularia on the group of zocecia 

 figured by Busk, marks a still wider departure from the 



