128 HISTORY OF BRITISH ZOOPHYTES. 



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

 pearance. The ceUs are small ; the yesicles pretty large, 

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

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

 at Stonehaven on the fishermen's nets. 



9. SERTULARIA PINASTER, W. Thompson. 



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

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

 Bay, 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. SERTTJLARIA MARGARITA, R. A. Tudor. 



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

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

 fessor Harvey ; Devonshire, Mrs. Griffiths ; Arran, D. L. 



This bears a considerable resemblance to S. pinaster in 

 the shape 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. 13, p. 73. 



