124 
concave below, through which the polype protrudes. T*'® 
cells are arranged in alternate rows, and are about lure 
times as long as they are wide. About December, Januar, > 
and February, numerous yellow semi-translacent sacs p ra 
trnde irregularly from all parts of the surface, which a '^ 
filled with a gelatinous fluid, which afterwards beco® e 
granular. On examination they appear to rise from 
llie 
S' V..^J — g 
sides of the cells, and make their external appearap ^ 
through the polype mouths, and finally grow to nearly 
the length of the cells. The production of these sacs, is 4 
destruction of the polypes of the cells in which they g r ° 
The polype is active, with twelve ciliated tentacula * n 
single circle. 
F. LINEATA. Encrnsting; cells oval, radiating fr 0 * 0 ^ 
centre ; apertures armed with numerous horizontal t et 
pointing towards the centre. ( 
Flustra lineata, Tnrton’s Lin., vol. 4, p. C65. JohnsW” 
Brit. Zooph., p. 288, pi. 28, fig. 4. 
Hah. On stones in pools between tide marks, com 0100 
Polperro. Whitsand bay. Goran. Fowey,.&c. ^ 
This encrusting species, appears to be enveloped in dp' 1 ^ 
and obscurity. It occurs in patches of about one 
diameter, but most frequently about one half or three-fo° r i( .y 
of an inch. The cells are oval, in juxtaposition and 
small. The apertures are armed with numerous 
horizontal teeth which meet about the centre; someto 
the teeth on one side are very greatly developed, while 
of the other are nearly abortive; but in all cases from 
presence of these teeth, the cells are hardly to be 
guished by the naked eye. On the distal margin are 
long diverging spines. „t 
Several gentlemen well acquainted with this depa rtl ^j J . 1 - 
of Natural History, have expressed a doubt as to the jt 
racter of this species; but though they have considering 
as an abnormal condition of some other species, they g, 
not even named the one to which they suppose it to be 
After many examinations of many specimens, I cannot ^ 
cover the reason for this opinion. However, to ascerta 11 '^ 
probability of such a deviation, I have procured spec* 1 
from twenty-five localities, differing from each otiier> ^ 
JVlr. Peach has procured me several others, from Gor a «* [||t> 
the neighbourhood, and a few have been procured lr° u J (er s, 
coast of Devonshire, all of which possess the same c * iara ^ e 
which if abnormal is very remarkable. I believe it t F 
good a species as any other in the list, though it seems 
be ihe Flustra lineata of Johnston's work. 
