BRITISH ZOOPHYTES. 219 



off from the top of a cell a little to one side, and facing 

 in the same direction as the cell. Zooecia uniserial, 

 elongate, tubular. Aperture terminal or subterminal, 

 with oral valve at extremity, margin armed with 

 spines. — T. H. 



1 . B. PELLUCiDA, Dijsfer. 



Rah.: Tenby {Dijster, Mrs. Brett). 

 Described by Dyster in Q. J. M. S., vi. 260. 



2. B. TUB^PORMIS. 



B. pellucida {A.M.N.). 



Hab. : South-east Coast (Boswell), Hebrides (Norman). 



Described by Rev. A. M. Norman in British Assoc. 

 Report, 1866, 196. 



These two species are rare, and have been described 

 from fragmentary specimens, 



FAMILY III. CELLULARID^. 

 Zooecia in two or more series, closely united and ranged 

 in the same plane. Avicularia and vihracula, or avicii- 

 laria only, almost tmiversally present, sessile. Zoarium 

 erect, dichotomously branched. — T. H. 



Genus I. Cellulaeia, Pallas. {Cellula, a little cell.) 



Zoarium jointed. Zooecia in two or three series, 

 many in each internode, contiguous, dorsal surface 

 perforated. Avicularia and vibracula usually wanting, 

 the former occasionally present on a few cells in an 

 internode. — T. H. 



C. Peachii, Bush 



? C. neritina (var. G. J.), Bugula neritina (vars. h, c, 

 d, e, Gray). 



Hab.: Peterhead (C. TF. P.), Buchanness, Tynemouth 

 [Lieut. Thomas, R.N.), Northumberland [Aid.), Shet- 



