SERTULARIA. 127 
See Dr. Johnston’s figure of Sertularia nigra, plate xu. 
fig. 1, 2. 
7. SertuLaRia PInnATA, Padlas. 
Hab. At the Lizard, Cornwall, Pallas; Devonshire, Mrs. 
Griffiths. I have it from Mr. Bean, Scarborough. 
Mrs. Griffiths mentions respecting this rare zoophyte that 
when fresh it is entirely of a deep blood-red colour, and 
when dried, brown. Pallas remarks that there is the closest 
resemblance betwixt it and S. migra; and Dr. Johnston 
states that the real difference between them les in the posi- 
tion of the cells and in the form of the vesicles. The cells 
arise, not from the sides exactly, but rather on the edge of 
the pinnules ; the vesicles are comparatively small, obconi- 
cal, with a series of tubercles or segments above, while the 
centre projects in the shape of a cone or nipple. See Dr. 
Johnston’s figure, plate xu. fig. 3, 4. 
8. Sertutaria Frusca, Robert Brown. 
Hab. Coast of Aberdeenshire, R. Brown; coast of North- 
umberland, Mr. Embleton; Scarborough, Mr. Bean ; Whit- 
burn, county of Durham, Miss Dale; Stonehaven, Lady 
~ Keith Murray. 
It is about three inches high, rigid, pinnate, dusky, 
blackish-brown, varnished. The cells are arranged in a 
