SERTULARIA. 129 



Mr. Tudor, of Bootle, had found this, and it had been sent 

 to Dr. Johnston by his. friend Mr. By lands, nlrnied S. Tudori, 

 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. SERTULARIA FALLAX, Dr. Fleming. 



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. SERTULARIA TAMARISCA, Sea Tamarisk, Ellis. (Plate 

 II. fig. 6.) 



