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 
Keith Murray for a good specimen of this rare species, found 
at Stonehaven on the fishermen’s nets. 
9, SerTuLARIA PINASTER, WV. 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, R.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. Serruntarta Marearita, &. 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. 18, p. 73. 
