CELLEPORA TUBIGERA. 409 



to have more or less connexion with the ovicell. Occa- 

 sionally stout conical rostra occur^ apparently uncon- 

 nected with a zocBcium^ bearing very large avicularia, with 

 broad triangular mandible. 



CeLLEPORA TUBIGERA^ Busk, 

 Plate LIV. figs. 7-9. 



Cellepora TUBIGERA, Busk, Crag Pol. 60, pi. ix. figs. 8 & 10: Manzoni, 

 B170Z. foss. Ital., Coiitr. iv. 14, pi. iv. fig. 25 (?). 



Zoariwn adnate^ irregularly convex or subconical. Zocscia 

 distant, connected by ridges, sparsely punctured ; orifice 

 orbicular, with a sinus in front ; cylindrical tubular 

 processes supporting avicularia arising from the front 

 or side of a cell, or from the intercellular ridges. \Busk.'\ 



Habitat. On shell, &c. 



Localities. Britain, south and west coasts (Busk) : 

 Lamlash Bay, Arran (G. West) . 



Geographical Distribution. Coast of France (Jef- 

 freys). 



Range in Time. Coralline Crag, on shell (S. W.) : 

 ? Italian Pliocene (Manzoni) . 



I am only acquainted with this species through the de- 

 scription and figures in the ' Crag Polyzoa,' and have some- 

 times fancied that it might be identical with C. avicularis. 

 It is difficult in this genus to form a positive opinion on 

 figures taken from the fossil ; the following, however, could 

 hardly have been written of the last-named: — "Instead of 

 the strong conical rostrum, with an avicularium on its 

 inner aspect, so characteristic of Cellepora pumicosa, most 

 of the cells are provided with slender subcylindrical ascend- 

 ing processes, having a small avicularium at or near the 



