TRIBE II I. MADREPORACEA. 571 



Ramose; branches covered with calicles; calicles tubular, a little 

 prominent, having a longitudinal fissure below ; near Millepora in 

 habit. 



This genus was instituted by Gray for the Milkpora asperaof Esper 

 and Lamarck. 



ERRINA ASPERA. (Esper.) Gray. 



E. ramosa, 4" alta; subcompressa,pauloflabellata, ramulis brevibus, suba- 

 cutis, caliculis ad apices et undique sparsis (superficie itaque asperata). 



Ramose, 4 inches high; subcompressed, somewhat flabellate; branch- 

 lets short, subacute ; calicles scattered every where, even over the 

 summits, the surface, therefore, throughout rough. 



Mediterranean Sea. Lamarck. Esper. 



. densl surculosa, &c., Gualt. Ind. , Deslongchamps, Encyc., 546. 



Test., back of tab. 55. Errina aspera, Gray, Zool. Soc. Trans., 



y, aspera, Linn., ed. xii., 1282. 1835, 85 ; Gray suggests, that the Mille- 



, Esper, Fortsetz. i. 106, tab. Mill., 18. pora tubulifera and pinnata of Lamarck, 



, Lamk., ii. 308, No. 4. may belong to this genus. 



CERIOPORA. BLAINVILLE. 



Pumilce; glomerate aut lamelloscB. Corolla stratis concentricis in- 

 structa; cellis orbiculatis, minutissimis, irregulariter sparsis. 



Minute; glomerate or lamellose. Coralla consisting of concentric 

 beds; surface covered with very minute circular cells, irregularly 

 scattered. 



This genus, as originally instituted by Goldfuss, on the ground of 

 a stratified structure and minute cells, contained various species not 

 properly related. The genus Chrysaora, of Lamouroux, embraces a 

 large part, characterized by their angular or polygonal lobato-ramose 

 forms, uneven surface, and pore-like cells, with nothing of a columnar 

 structure. The species are minute, and may be Bryozoa. Blain- 



