TRIBE III. MADREPORACEA. 489 



nales, ssepe obliquas formantibus, hispidis, extus striatis, aperturis 

 patulis, | J'" latis, terminalibus rnagnis parurn prominulis." Speci- 

 mens in the Royal Museum at Berlin. 



H. Forskalii (sp. 20). " 9" lata, 7" alta, rubella, cespitosa, subtur- 

 binata, subfastigiata, dense ramulosa, stellulis exsertis, brevibus, sub- 

 tus semitubulosis, hemisphericis, apertura ovata patula, totis hispidis, 

 extus striatis, raro tubulosis, integris, ramis apice ramulosioribus, stel- 

 lularum terminahum paullo majorum apertura, parva." General 

 habit like that of the Hemprichii. Red Sea. 



H. tylostoma (sp. 21). " Pedalis (an bipedalis?), ramosa, ramis 

 crassis (9'") paucis, teretibus, non tubulosis, stellulis collo brevi suf- 

 fultis, interdum reclinatis, glabriusculis, terminalibus 1J'" latis, majo- 

 ribus." Several fragments in the Berlin Museum. 



GENUS II. MANOPORA. DANA. 



Madreporidce foliacece, subramosoe aut gkmeratce, nunquam arborescentes 

 nee ramis teretes ; tentaculis brevibus, alternis scepe majoribus, polypo 

 apicali nullo. Corolla caliculis irregularibus, scepe spinoso-laciniatis, 

 scepe omnino obsoletis. 



Foliaceous, glomerate, or subramose, never arborescent, and branches 

 not terete, having short tentacles, often alternately large and small, 

 and no apical parent-polyp distinguishable. Corallum with the 

 calicles irregular, often spinuloso-laciniate, often wholly obsolete. 



The Manopora are Madrepores in their cells, and animals; but they 

 form more fragile coralla, and never grow in terete, arborescent forms. 

 Many of them spread out in broad, fragile folia, which are sometimes 

 clustered like the leaves of an opening plant. Others have a spreading 

 base, but rise in rude subramose masses, angular or lobed ; others are 

 simply glomerate and incrusting, yet occasionally become branched 

 by following up growing serpulas ; while a few are rather delicately 

 ramose, and resemble Millepores, although unlike them in their cells. 



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