72 MANICINA. 



MYCETOPHYLLIA M.-Edw. & H. 



Mycetophyllia Lamarckana Edav. & H. 



Eatlier rare. I have found it living on the reef at Looe Key, and 

 dredged it np from five ftithoms in the channel at Key West. 



Mycetophyllia Danaana Edw. & H. 



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

 also a young one obtained living by myself 



Rare. 



MUSSA Oken. 

 Mussa angulosa Oken. 



Mussa carduus Dana. 

 Eare. Worn specimens. 



MANICINA Ehrbg. 

 Manicina areolata Eiirijg. 



Ver}^ common from about three feet below low-water mark to five or 

 six fithoms, chiefly in sheltered places. It is particularly {il)undant on ' 

 sandy or muddy flats, partly overgrown wdth sea-grasses (Thalassia), in- 

 side the reef. The young when developing normally assume a very 

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

 them forming the ends; but the primary or secondary septa are not 

 enlarged, as in Isophyllia, to form the partitions between the lobes. 



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

 general shape, I can find no specific diflcrences among the large number 

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

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

 but from the descriptions I can see no good reason for admitting more 

 than one West Indian species. 



