130 HISTORY OF BRITISH ZOOPHYTES. 



Hab. Entrance to Dublin Harbour, Ellis ; Belfast Lough, 

 Templeton; Ballycastle, Dr. J. L. Drummond; Howth, 

 Mr. E. Ball ; Portmarnock, Mr. W. Thompson ; near Aber- 

 deen, Dr. Skene ; Frith of Forth, Dr. Coldstream ; Scar- 

 borough very rare, Mr. Bean ; Bootle, Mr. Tudor ; Corn- 

 wall, Mr. Couch; Devon and Norfolk, very rare indeed, 

 Mr. C. W. Peach. 



" Its ramifications are irregular, but chiefly alternate ; its 

 texture is of a thin, transparent, horny nature ; the denticles 

 or ceUs are large, cylindrical, open and opposite, and each 

 pair seems fixed in the top of the next pair below it. The 

 vesicles appear to be shaped like a heart, with a short tube 

 at the top, not unlike the aorta, cut off/' (Ellis.} It bears 

 some resemblance to S. rosacea, but it is of a much more 

 robust habit. I have not observed it on the Ayrshire coast, 

 but I have fine specimens of it from my liberal friend Mr. 

 Tudor, and also from D. L., junior, got in the Frith of 

 Forth. 



13. SERTULARIA ABIETINA, Sea-fir Coralline. (Plate V. 

 fig. 14.) 



Hab. On shells and stones in deep water, common. It 

 is not common, however, on the coast of Ayrshire. We 

 have occasionally picked up a specimen, having, however, a 



