72 MANICIXA. 



MYCETOPIIYLLIA M.-Edw. & H. 



Mycetophyllia Lamarckana Edw. & 11. 



Rather rare. 1 have I'omid it living on the reef at Looe Key, and 

 dredged it up i'wm live fathoms in the channel at Key West. 



Mycetophyllia Danaana Ei>w. & II. 



Several worn specimens in the Museum are referred to this species; 

 also a young one obtained li\'ing by myself 



MUSSA Oken. 



Mussa angulosa Okex. 

 Rai-e. 



Mussa carduiis Dana. 

 Rare. Worn spe(;imens. 



MANICINA Eiiunc. 

 Manicina areolata Einu.c. 



Very connnon from a])out three feet below low-water mark to live or 

 six fathoms, chietly in sheltered places. It is particularly abundant on 

 sandy or muddy Hats, partly overgrown with sea-grasses (Thalassia), in- 

 si(K' I lie reef. Tlie young when devek)ping normally assume a very 

 elongated form with wavy sides, which soon form six lobes, two of 

 them forming the emls; but the })rimary or secondary septa are not 

 enlai'gcMJ, as in Isophyllia, to form the partitions between the lobes. 



Although a great diversity prevails in the adults, with regard to the 

 general shape,! can find no specific diiferences among the large nnnd)er 

 of specimens examined. I have not seen authentic specimens of the 

 other species enumerated by the authors as found in the West Indies; 

 Ijut from the descriptions I can sec no good reason for admitting more 

 tiian one West Indian species. 



