CUP-AND-SAUCER LIMPETS. 211 



The genus Calyptrcea includes all those in which the 

 septum gradually becomes modified to the form of a de- 

 tached cup (the Cup-and-saucer Limpet). 



A new and remarkable property has been lately discovered 

 by Mr. Cuming^ as pertaining to a mollusk of which the 

 shell is closely allied to that commonly known as the 

 C, equestris. This distinguished naturalist^ having arrived 

 at the island of Zebu^, one of the Philippines, found on the 

 coral reefs, which extend to some distance from the shore, 

 numerous dead shells among the deposits of the ocean, in 

 consequence of which he sought for some days to obtain 

 living specimens. Yain, however, were his attempts, till at 

 length, curiosity having induced him to desire the removal 

 of a mass of coral, that lay sunk nearly two feet in the sand, 

 about low-water mark, he caused his attendants to lift it 

 with the aid of levers. After much toil they succeeded in 

 raising the mass sufficiently high to admit of ascertaining 

 that the animal he was in search of lay beneath. The 

 creature adhered to the under surface, and when Mr. Cuming 

 endeavoured to move the shell, he found that it rested on 

 a strong calcareous plate, resembling a fiat saucer, and 

 evidently deposited to facilitate its attachment. His anxiety 

 to secui-e this interesting mollusk in a perfect state, induced 



