THE THORNY OYSTKE. 



421 



The File-shell can pass through the water with some rapidity, urging itself along by 

 the sharp closing of its valves. Its colour is crimson, with the exception of the mantle, 



LIMA. Lima hians. 



which is orange. The shell is pure white, so that a living and healthy specimen is a most 

 beaAitifnJ creature. 



THORXT OYSTER -Sfxmdylvt Americans. 



A VEIIY curious example of this family is found in the THORNY OYSTEE, a species 

 that is remarkable for the singularly long projections from the shell The object of these 



