88 



24. Ast7\ heliopora. . . . South Sea. 



25. — crispata. . . . Indian Sea. 



26. — diffluens. . . . South Sea. 



27. — calycularis. . . . Sea of New Holland. 



28. — intersepta. . . . South Sea. 



29. — emarciata. . . . Fossil ; Grignon. 



Glomerated ; the surface reticulated ; the stars subpentagonal, 

 hollow, contigiaous ; very few lamellae separate from the axis. 



30. — siderea. . . . Mad. siderea, Sol. and Ellis, Tab. xlix. fig. 2. 



31. — galaxea. . . . Mad. galaxea, Sol. and Ellis, Tab. xlvii. fig. 7. 



The corals of this genus will be frequently found in 

 former writers, under the name astroites. 



At PI. ix. fig. 11, is represented the section of a fossil 

 astrea in calcedony, from Antigua, by favour of Dr. Nugent, 



Porites. — A ston}^ polypifer, fixed; ramified; or lobated 

 and obtase ; the outer surface stellated all over. 



The stars are regular, nearly contiguous, superficial or 

 excavated ; no margin or an imperfect one ; the lamellae 

 filamentous, interrupted or cuspidated. 



Porites resembles both astrea and madrepora in some 

 respects ; but their stars differ materially. They are not at 

 all or but partially circumscribed; their lamellae are but 

 filaments, like the points of pins, and are either tuberculated 

 or cuspidated. The edge of each star is dentated or echi- 

 nated, so as to be confounded with the interstices which are 

 often echinated in the same manner. 



1. For. reticulata, .. .MdiA. retepora. Sol. and Ellis, Tab. liv. 



fig. 3 — 5. 



2. — conglomerata. . . . Absque descriptione, Sol. and Ellis, Tab. 



xli. fig. 4. 



3. — astreoides. . . . American Ocean. 



4. — arenacea. . . . Mad. arenosa ? Gmelin. 



5. — clavaria. . . . Mad. porites, Sol. and Ellis, Tab. xlvii. fig. 1. 



6. — scabra. . . . Mad. digitata, Sol. and Ellis, No. 74. 



7. — elonyata. 



