TRIBE III. MADREPORACEA. 50 1 



que notato, tentaculis 12, papilliformibus, minimis. Corallum aspe- 

 rum, cellis exiguis (A'" latis), immersis, per lamellulas asperas circum- 

 vallatis, interstitiis setosis, setis exiguis, asperis, obtusis, subcequalibus, 

 juxta cellas lamellosis. 



Spreading glomerate, incrusting, reddish, surface convex and tuber- 

 culous ; polyps bright violet, or verging towards red, disk marked 

 with 12 white -and violet lines, tentacles 12, papilliform, minute. 

 Corallum asperate ; cells minute ( a line), immersed, surrounded 

 by rough minute lamellae, interstices setose, setae slender, rough, 

 obtuse, subequal, lamellate about the cells. 



Red Sea. Ehrenberg. 



The above characters are from Ehrenberg's description of this 

 species. It is stated to grow to the size of half a foot. The species 

 agrees nearly in the character of the surface with the effusa, but 

 differs from it in its glomerate mode of growth. 



M. Parties stilosa, Ehrenberg, Gen. Ixx., sp. 14. 



15. MANOPORA VENOSA. (H. 4- Ehrenberg.) Dana. 



M. effusa, glomerata, gibbosa. Corallum asperum, scabritie subtilissi- 

 mum, cellis majoribus (!'" latis), margine calloso reticulatim con- 

 juncto, inaquali, (itaque super fide cor alii venosd); stellis conspicue 

 12-radiatis. 



Spreading, glomerate, gibbous. Corallum rough with extremely 

 minute points; cells quite large (1 line broad), with callous mar- 

 gins, which are reticulately united and uneven, giving a venose 

 appearance to the surface ; stars distinctly 12-rayed. 



M. Porites vetiosa, Ehrenberg, Gen. Ixx., sp. 15. 



16. MANOPORA NODOSA. (Dana.) 



M. incrustans, glomerata, tuberculosa, tuberculis subconicis ; polypis 

 pallide violaceis, tentaculis obsoktis, disco \Z-crenato, margine albo. 



126 



