142 
minute pores on the upper surface. These disappear * n 
drying, and the colour changes to a very pale brown. 
BRITISH CORAL. M. Polymorpha. Calcareous, en- 
crusting, rising either in globular heads or kneed branches* 
Corallium pumilum album, fere lapideum ramosunt, 
Corallium album pumilum nostras, R. S., Ellis’ Coral., p. 
pi. 27, no. 1,C. Millepora polymorpha, Ellis and Solander’s 
Zooph., p. 130. Turton’s Lin., vol. 4, p. 638. Fleming’ 9 
Brit. An., p. 528. Stewart’s Elem., vol. 2, p. 426, Bellamy’ 9 
Nat. Hist, of South Devon, p. 269. Sprig or branchy Corah 
Borlase’s Nat. Hist, of Cornwall, p. 239, pi. 24, figs* 4 
and 5. 
11 ah. On rocks from the Rame Head to Falmouth; 
abundant in the Falmouth mud. 
On the rocks, it is found encrusting, and rising in*® 
globular heads sometimes singly, and at others congregate” 
like a bunch of grapes. In the Falmouth mud it occurs a9 
kneed branches in abundance; from the time of the Natural* 9 *' 
Ray, to the present time, a period of about 150 years, it ba*j 
been used, in that neighbourhood, as a manure without m' 10 * 1 
apparent decrease of the supply. Its virtues as a mantt* -0 
are increased, either by burning, or beating to a coar 9 ® 
powder. 
