CELLEPORID^. 397 



belong- to the present species. Subsequently a large stone, 

 dredged off Polperro, and sent me by Mr. Lauglirin, 

 yielded a small group of specimens referable to R. Couchii, 

 as is also a minute fragment in my possession from some 

 other part of the Cornish coast. All the south-western 

 examples of Retepora, thereforCj which have come under 

 my observation belong to the present species ; and it is 

 probable, I think, that Borlase's specimen belonged to it 

 also. R. Couchii has been taken in Guernsey. I know 

 of no British specimen of R. cellulosa, Smitt, though it 

 occurs both in Scandinavia and the Mediterranean. 



Family XV. — Celleporidae. 



Celleporid.e, Johnston (part.) : Busk : &c. 

 EsciiARiD.E (part.), D'Orbiguj-. 

 MYRiozoiDiE (part.), Smitt, Flor. Bryoz. 



ZocEciA calcareous, more or less vertical to the plane or 

 axis of the colony, irregularly heaped together, ivith a 

 terminal orifice. 



In his later writings Prof. Smitt has abandoned this family, 

 and placed his genus Cellepora amongst the Myriosoiclce. I 

 venture to think that there are sufficient grounds for its 

 retention. The erect habit of the cells and the confused 

 way in which they are aggregated are not the only cha- 

 racters which differentiate this section. The zocecial cha- 

 racters, in my judgment, supply a good basis for the 

 family, and, in combination with the vertical habit and the 

 irregular gemmation, indicate a very natural group. 



