142 



minute pores on the upper surface. These disappear in 

 drying, and the colour changes to a very pale brown. 



BRITISH CORAL. M. Pohjmorpha. Calcareous, en- 

 crusting, rising either in globular heads or kneed branches. 



Coralliuni puniiliim album, fere lapideum ramosum, et 

 Corallium album pumilum nostras, R. S., Ellis' Coral., p. 76, 

 pi. 27, no. I,C. AJillepnra polymorpha, Ellis and Solander's 

 Zooph., p. l:iO. Tnrti»n's Lin., vol. 4, p. 638. Fleming's 

 Brit. An., p. 528. Stcwarl's Elem., vol. 2, p. 426, Bellamy's 

 Nat. Hist, of South Devon, p. 269. Sprig or branchy Coral, 

 Borlase's Nat. Hist, of Cornwall, p. 239, pi. 24, figs. 4 

 and 5; 



Ihih. On rocks from the Rame Head to Falmouth ; 

 abundant in the I'^almouth mud. 



On the rocks, it is found encrusting, and rising into 

 globular heads sometimes singly, and at others congregated 

 like a bunch of grapes. In the Falmouth mud it occurs as 

 kneed branches in al)undance; from the lime of the Naturalist 

 Ray, to the present time, a period of about 150 years, it has 

 been used, in that neighbourhood, as a manure without much 

 apparent decrease of the supply. Its virtues as a manure 

 are increased, either by burning, or beating to a coarsa 

 powder. 



