MILLEPORA. 129 



actions, in the Millepora calcarea and Millepora liche- 

 noides. 



2). Thofe that grow like the Fluftra of Linnaeus, or 

 Efchara of fome authors, which have their cells difpofed 

 regularly, either in fingle layers as in fome, or in double 

 layers as in others, which laft are placed back to back, 

 like the cells in the combs of bees ; and thefe are either 

 in irregular undivided forms, or divided into branches. 

 The firft are the Millepora Spongites and M. foliacea, and 

 the fecond kind are the Millepora taeniaiis and M. cervi- 

 cornis. 



3). Thofe that are compofed of clufters of cellular 

 poros, irregularly arranged, as in the Millepora pumicofa, 

 M. tubulofa, and M. rubra. 



4). Thofe that have fmall veffels running through them 

 lengthways in the infide, and which fend out pores only 

 on one fide, as in the Millepora foraminofa, M. reticu- 

 lata, and M. tubipora ; or that fend out their pores in a 

 line on the margin, as in the M. violacea. 



5). Thofe that grow with the fame internal longitudinal 

 veffels, and fend out pores on all fides, as in the Mille- 

 pora truncata, M. alcicornisj and M. czerulea. 



This laft Millepora csrulea has its pores larger than the 

 reft, befides they appear a little inclined to a ftellated 

 form; fo that it very properly joins this genus to the 

 Madrepora, whofe character is a Coral with radiated 

 pores. 



[i]. MlLLEPORES THAT ARE ALMOST SOLID. 



I. Millepora calcarea. Chalky Milhpore. TAB.23. 



r Fig. 13. 



Millepora ramofa albif- This Millepore is extremely 



ftma folida dichotoma> ra- white, folid, and dichoto- 



S mulis 



