SERTULARIA. 129 
Mr. Tudor, of Bootle, had found this, and it had been sent 
to Dr. Johnston by his friend Mr. Rylands, named S. Zudor:, 
but as it wanted vesicles Dr. Johnston delayed publishing a 
description of it, in the hope that a specimen with vesicles 
might be found by Mr. Tudor. In the meantime it was 
found with vesicles by Mr. Hassall, who assigned to it the 
christian name of a lady distinguished for an ardent love of 
the works of nature, and also as a zealous collector in various 
branches of natural history. 
11. Sperrunartia FALLAX, Dr. Pleming. 
Hab. On oyster-beds, common, Dr. Fleming; Frith of 
Forth, plentifully, Dr. Coldstream ; near Dunstanborough, 
Mr. Embleton; Whitburn, Miss Dale; Scarborough, Mr. 
Bean; Aberdeen, Mr. J. Macgillivray; Stonehaven, Lady 
Keith Murray. 
Attached by tubular fibres; from two to four inches in 
height, branches alternate; rachis of a dusky horn-colour ; 
cells tubular ; ovarian vesicles pear-shaped, with four con- 
vergent segments at the top. I have not met with this on 
the Ayrshire coast, so that the only specimen I have of it is 
from Lady Keith Murray, found by her at Stonehaven. 
12. SerruLaria TAMARISCA, Sea Tamarisk, Elis. (Plate 
II. fig. 6.) 
