CORNISH POLYZOA. 267 



my shells had a Hermit Crah in it. Perliaps I ought not to have 

 said shell, the calcareous part being probably dissolved by the 

 Cellepora. It is not the only Polyzoa that decomposes shell 

 matter. I have seeu many shells scooped by Polyzoa, no doubt 

 for the purpose of being used to build up their cells. 



8. JDiastopora Sarniensis. Another addition to the Cornish 

 list. The Pev. Mr. Norman figured this in the Annals and 

 Magazine of Natural History, Vol. XIII, part II, figures 4, 6. 

 It was dredged by him off Jersey and Guernsey in 1859. He 

 describes it as "milk-white, opaqvie, &e., not marked with the 

 alternate opaque and transparent radiating lines of Biastopora 

 oheliay He also mentions " a tube with a little cap, &c., as 

 probably organs of reproduction." In this I believe he is 

 right. Mine has them well developed, and such "little caps" 

 are now well-known as " oiY/r/rm i/'mc/^s." I got my specimens 

 in 1848, from Lantivet Bay, on a shell of Isocordia cor. 



Thus then, I have the happiness of introducing six new species 

 of Polyzoa to your already long list, viz. : — 



Caharea Boryi. 



Memlranipora coriacea. 



Lepralia lahrosa. 



Lepralia eximia. 



Cellepora Edax. 



Biastopora Sarniensis. 



