87 



The stars in this genus are circumscribed. The sub- 

 stance is never raised in extended expansions, or developed in 

 leaves, as in the explanariae, or ramified like the madrepores. 



The stars are in some separated from each other by 

 interstices, and in others, though circumscribed, they are 

 contiguous. 



Stars separate, even from their base. 



1. Astr. radiata Mad. radiata, Sol. and Ellis, Tab. xlvii. fig. 8. 



2. argus. . . . Mad. Cavernosa, Esp. Supp. i. Tab. xxxvii. (the 



great Astroites.) 



3. annularis. . . . Mad. annularis, Sol. and Ellis, Tab. liii. 



fig. 1, 2. 



4. rotulosa Mad. rotulosa, Sol. and Ellis, Tab. Iv. fig. 1 3. 



5. ananas. . . . Mad. ananas, Sol. and Ellis, Tab, xlvii. fig. 6. 



6. detrita. . . . Mad. detrita, Esper. Supp. i. Tab. xlvi. 



7. porcata. . . . Mad. porcata, Esper. Supp. i. Tab. Ixxi. 



8. punctifera. . . . Mad. Indian Seas. 



9. myriopthalmia. . . . Mad. Indian Seas. 



10. micropthalmia. . . . Sea of New Holland. 



11. pleiades Mad. pleiades, Sol. and Ellis, Tab. liii. fig. 7, 8. 



12. stellulata Mad. stellulata ? Sol. and Ellis, Tab. liii. fig. 3,4. 



13. obliqua. . . . Sea of Guiana. 



14. palifera. . . . South Sea. 



15. pulvinaria. . . . South Sea. 



Contiguous stars. 



16. Astr. dipsacea Mad. favosa, Sol. and Ellis, Tab. 1. fig. 1. 



17. favosa. . . . Mad. favosa, Esper. Supp. i. Tab. xlv. fig. 1. 



18. denticulata Mad. denticulata, Sol. and Ellis, Tab. xlix. 



fig. 1. 



19. versipora. . . . Indian Sea. 



20. deformis. . . . Indian Sea ? 



21. reticularis Mad. favosa. Am. ac. Tab. iv. fig. 16. Fre- 



quently found fossil. 



22. abdita Mad. abdite. Esper. Supp. Tab. xlv. fig. 2. 



23. retiformis. . . . Resembles in its network, Mad. retepora, Sol. 



and Ellis, Tab. liv. fig. 3 5. which, however, is a true 

 species of porites. 



