128 HISTORY OF BRITISH ZOOPHYTES. 



cross row along each margin, and have a quadrifarious ap- 

 pearance. The cells are small ; the vesicles pretty large, 

 unilateral, pear-shaped, and smooth. I am indebted to Lady 

 Keitli Murray for a good specimen of this rare species, found 

 at Stonehaven on the fishermen^s nets. 



9. Sertularia pinaster, JF. Thompson. 



Hab. Mr. W. Thompson, of Belfast, states respecting this 

 rare species, that it was dredged by Mr. Hyndinan in Belfast 

 Bav, and also off Sana in the western coast of Scotland. A 

 single specimen also was dredged by Captain Beechey, E.N., 

 off the Mull of Galloway. It bears a resemblance in form 

 to S. rosacea^ as may be seen by looking at Dr. Johnston's 

 figure 12, page 72. The difference lies in the ovarian ve- 

 sicles. 



10. Sertularia Margarita, R. A. Tudor. 



Hab. Mouth of the Mersey, Mr. Tudor; off Ilowth, and 

 near the Giant's Causeway, Mr. Hassall ; Dublin Bay, Pro- 

 fessor Harvey; Devonshire, Mrs. (iriffiths; Arran, 1). L. 



This bears a considerable resemblance to S. pinaster in 

 the sha])e of the cells, but it differs from it in the shape and 

 in the larger size of the vesicles, which are rounded at the 

 top and arranged in two circles. See Dr. Johnston's Zoo- 

 phytes, fig. 18, p. 73. 



