10 JONES— ON NATURAL HISTORY OF THE BERMUDAS. 



and shores of the Bermudas, occurring in all places where the 

 tide ebbs and flows. Cabinet specimens are easily obtained in 

 the little tidal pools between high and low water mark ; a long 

 chisel and a mallet, enabling the collector to remove them with- 

 out difficulty. Individual polyp cells may be obtained resting 

 alone before becoming enlarged by the budding process, or 

 masses of several adhering together. Large specimens are to 

 be seen in about one and a half fathoms at the south- 

 west corner of Harris's Bay at low water. This coral grows 

 well in shoal water and is found within a foot of the surface. 

 It is very common about the islands of the Great Sound, and 

 also about Trunk Island in Harrington Somid. 



Gen. Mgeandrina. 



Mceandrina cerebriformis. Lam. 

 Moeandrites costis latis, Gualt. 

 Madrepora labyrinthiformis, Linn. 



" mcBandrites, Pallas. 



Lajpis corcdlinus, Seba. 

 Platygyi'ci cerebriformis, Ehren. 

 Di;ploria cerebriformis. Mil. Edw. 



This beautiful coral which is known to collectors as the 

 " brainstone " is common among the Bermuda reefs, growing to 

 a very large size : sometimes three feet in diameter. Cabinet 

 specimens of six inches diameter are more easy to collect, for it 

 requires great leverage to detach the larger specimens from their 

 foundations ; without taking into consideration their weight, 

 which is immense. Very large, perfect, and well cleaned 

 specimens are highly appreciated in the English and Continental 

 museums, few of which really possess fine examples of this 

 coral. On breaking open a large specimen, the interior will be 

 found to be tunnelled through in places by the Lithopltaga 

 lithojphagus. It cannot be considered a shallow water species, 

 for I have never observed it growing at a lesser depth than 

 about four feet from the surface. Some tine specimens may be 

 seen about the centre of Harris's Bay, and other parts of the 



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