130 



REV. T. HINCKS ON POLYZOA 



Family Membraklporidjs. 

 Membraintpora, De Blainville. 

 Meiorantpora payus, Hinchs *. 



" Zocecia oval, or hexagonal, or suborbicular (presenting many 

 irregularities both in form and arrangement), of considerable 

 depth, closely packed together, surrounded by a narrow brown 

 line, which forms a kind of keel on the top of the cell-wall ; inner 

 surface of the margin granular ; aperture occupying the whole 

 front of the cell, closed in by a delicate membrane ; numerous 

 small cells of various shapes (sometimes quadrate, with an orbi- 

 cular aperture) interspersed amongst the larger ones. Avicularia 

 none. 



" Zoarium forming a rather thick crust, and (especially in the 

 absence of the membranous front wall) closely resembling a 

 honeycomb." 



Membrantpora marginella, Hincksf. 



" Zooecia rather small, quincuncially arranged, ovate or pyri- 

 form, sometimes pointed below, with a rather thick, unarmed, 

 minutely granular margin ; aperture occupying about two thirds 

 of the front and closed in by membrane, contracted above and 

 expanded and rounded below ; a small oval avicularium, borne on 

 the margin of the zocecia, usually placed on the side, near the 

 top. Occasionally cells with a very large oral operculum of a 

 dark horn-colour, occupying nearly half the aperture, and in- 

 closed by a thin raised border (? avicularian or reproductive)." 



Family SxEOANOPORELLiDiE. 

 Steqanoporella, Smitt. 



S'l KOANOPORELLA MAGNILABRIS, Busk. 



1 1 db. Spreading over stone. 



SmITTIPOBA, J. Jullien. 



SlHTTIPOBA ABYSS I COLA, S??lift. 



« Ann. & Mag. Bfftt. Hift, Mr. . r >, ?ol xiii. |». .'5. r >7, |>1. xiii. flg, 2 (1884). 

 t Ibid, p. 856, pi. x i if fig, 1 (1884). 



