318 NATURAL HISTORY OP 



Genus Bus:eia, Alder. 

 (In honour of Prof. Busk.) 



Zooecia corneous, flask-shaped, decumbent, adherent 

 for a great part of their length, developed at intervals 

 from a creeping tubular stem ; a membranous area on 

 the ventral (or under) side immediately below the 

 orifice. Polypide with a small number of tentacles. 

 Gizzard .?— T. H. 



1. B. NiTENS, Alder. 



Hab. : Northumberland (Aid.)., Guernsey, Devon, 

 Yorkshire Coast (T. If.), Wick {C.W.P.), Plymouth 

 {A. S. P.). 



" Minute, horn-coloured, shining, creeping fibre 

 branching or anastomosing, with occasional short 

 spinous offsets. Cells ovate or flask-shaped, tapering 

 towards the orifice, the margin of which is thickened 

 and slightly nodulous ; sides of the cells produced into 

 irregular flattened spines adhering to the substance 

 on which it creeps, and giving the cells an insect-like 

 appearance. Tentacles 8, short, and rather stout." — 

 Alder. 



FAMILY VI. CYLINDR^CIID^. 



Zooecia not contracted helow, closely united to the 

 stem at the base, not deciduous; destitute of a mem- 

 branous area, — T. H. 



Genus Cylindr^cium, Hinchs. (KvXtvSpoq, a cylinder ; 

 oIkIov, a home.) 



Zooecia elongate, cylindrical, crowded together or 

 .scattered, rising from a creeping stolon. Polypide 

 without a gizzard. — T. H. 



1. C. GIGANTEUM, Bush. 



