MOLLUSCA. 67 



the steep crags where it lives and is so strong that it can 

 not be taken from its shell. 



The Wrinkled Roundmouth (turbo rugosus), plate 

 25, fig. 2, is about two inches long, rough, and traversed 

 with lines of green. Found in great numbers in the Med- 

 iterranean Sea. 



The Marbled Cone (conus marmoreus) has a conical 

 shell, the spire of which is so short that it can be placed 

 upright. It is about three inches long, one and a half 

 in circumference, black, with numerous triangular white 

 spots, which give it the appearance of being covered with 

 delicate network. Their eggs resemble a pile of coarse 

 cords, and are eaten as well as the snail itself. It is 

 found in the East Indies, where they use the shell for 

 ornamental purposes, such as making rings, etc. Much 

 resembling the above-described, only having a longer 

 spire, is 



The Point 'ed Cone (conus acuminatus), plate 25, fig. 8. 

 The shell is reddish-white, waved with many fine lines ; 

 is found in the East Indies, but is very rare. There are 

 many others of the genus conus, which are remarkable 

 for the brilliant beauty of their colors. 



The Bishop's Cap (volvaria episcopus) is about five 

 inches in length and one in thickness, smooth, white, and 

 marked with square spots of a red color ; it is found in 

 the East Indies, and inflicts dangerous wounds with its 

 muzzle. 



The Tiger Porcelain Snail (cyprgea tigris) differs 

 from all other snails in having the shell arched above, 

 and a notched aperture below. Its length is four inches, 

 circumference three, very smooth like porcelain, of a 

 bluish-white, dotted thickly with dark broAvn ; a stripe 

 of light brown runs across the back. This beautiful mol- 



