240 BRITISH NULLIPORES : 



to a very gross mortar, with coarse gravel, in a large proportion, 

 and a great quantity of the fragments oi white coral, which 

 abounds upon the shores of the island." Essays, p. 133. 



2. N. CALCAREA, " is extremeli/ white^ solid, and dicho- 

 tomously branched ; the Utile branches often unite together 

 and become smaller at the ends." 



Plate XXIV. Fig. 4, 5. 



Millepora calcarea, Ellis and Soland. Zooph. 129, pi. 23, fig. 13. 



Lam. Anim. s. Vert. ii. 204 : 2de edit. ii. 312. Bosc, Vers, ii. 



344. 

 M. polymorpha, var. tophiformis, Esper, Millep. tab. 15. 



Hah. On the coasts of the south of England and west of 

 Scotland. Devonshire, Dr Coldstream. 



Coral from one to two and a-half inches high, white, solid and 

 calcareous, the branches sometimes few and distant, at other 

 times numerous, short and inosculating : the surface is smooth 

 or in some places marked with depressed mammillary tubercles. 

 It is certainly nothing but a different state of the preceding : 

 and Pallas has rightly commingled their peculiarities in his de- 

 scription of Millepora calcarea. 



3. N. FASCicuLATA, tufted and mucli branched, thebran- 

 ches erect, dilated upivards tvith flattened and often dim- 

 pled apices. 



Plate XXIV. Fig. 6. 



Millepora fasciculata, Lam. Anim s. Vert. ii. 203 : 2de edit. ii. 31 1. 



Risso L'Europ. Merid. v. 348. 

 Nullipora fasciculata, Blainv. Actinol. 605. 



Hah. — The coast of Ireland, whence specimens were sent to 

 me from Mr Ball, through the medium of William Thompson. 

 They were gathered in Roundstone Bay. 



This coraUine has a great resemblance to the lichen named 



