528 ZOOPHYTA. CELLULTFERA. Milleporad*. 



CELLULIFERA. 



A. Substance rigid, stony. 



I. Cells in the form of minute pores, imbedded. Milleporad.*. 

 Millepora. 



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



Tubipora. 



Favosites. 



Tubulipora. 



Discopora. 



Filipora. 



Terebellaria. 



III. Cells utricular, adjacent, or superimposed. Eschahadje. 

 Eschara. 

 Retepora. 

 Cellepora. 

 Berenicea. 

 Hippothoa. 

 Alecto. 



A. A. Substance flexible. FLUSTRABiE. 



Farcimia. 

 Flustra. 



MILLEPORAD^E. 



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, Ellis, Coral. 7<*. 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 which state it seems to be the Corallina auricnlariceformis 

 of Sower. Brit. Misc. t. lvi ; 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. j. 



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

 incrusting. 



Corallium album pumilum nostras, Ray, Syn. Stirp. 32. Ellis, Coral. 7<». 



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 Melobesia of Lamouroux ; on shells and fuci ; 

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

 forming "irregular lobes, spreading tubercular masses, or rising into irregular 

 short branches. 



