528 ZOOPHYTA. CELLULTFERA. Millepoead.e. 



CELLULIFERA. 



A. Substance rigid, stony. 



I. Cells in the form of minute pores, imbedded. MiLLEPOHADit. 



Millepora. 



II. Cells tubular, and produced beyond the surface. Tubiporad^. 



Tubipora. 



Favosites. 



Tubulipora. 



Discopora. 



Filipora. 



Terelellaria. 



III. Cells utriculai*, adjacent, or superimposed. Eschabauji:. 

 Eschara. 

 Retepora. 

 Cellepora. 

 Berenicea. 

 Hippothoa. 

 Aleclo. 



A. A. Substance flexible. Flustrad^e. 



Farcimia. 

 Flustra. 



MILLEPORAD^. 



Gen. XLVI. MILLEPORA. — Pores very minute, perpendi- 

 cular to the surface, giving the interior a finely striated 

 fracture ; form irregular. 



117. M. lichenoides. — Subincrusting, with semicircular plates, 

 variously united ; minute pores on the under side. 



Corallium cretaceum, lichenoides, El/is, Coral. 76- t. xxvii. f. d. D. Borl. 



Corn. 239. f. 2, 5.— Mill, lich — Sol. Ell. Zooph. 131. t. 23. f. 10, 12.— 



English coast. 



Variously shaped, sometimes hemispherical ; when young it is extremely 



thin and brittle, in Avhich state it seems to be the Corallina auricitlaruefonnis 



of Sower. Brit. Misc. t. Ivi ; the semicircular plates are of various sizes, and 



constantly grow horizontally; their margins bend over, which makes them 



convex on their upper side, and concave underneath. „ 



118. M.. polymorplia. — Irregularly ramose, tuberculated, or 

 incrusting. 



Corallium album ]iumilum nostras, Ray, Syn. Stirp. 32. ElUs, Coral. "<>. 



t. xxvii. f. C M. pol. Linn. Syst. i. 1285. — Common on submarine 



rocks, in shallow water. 

 When young, this species appears in thin irregularly circular patches, ap- 

 parently constituting the genus Melolesia of Lamouroux ; on shells and fuel ; 

 it usually continues a thin crust of a purple colour ; on rocks it thickens, 

 forming irregular lobes, spreading tubercuhir masses, or rising into irregular 

 short branches. 



