Sect. XL] 



ZOOLOGY 



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care only to fill the mouths of those which are turbinated 

 with tow or cotton to prevent fracture. It may he some- 

 times requisite to put a live shell into hot water and boil 

 it a minute or two, in order to dislodge the animal^ wl 

 may then he removed with a crooked pin. 



The land-shells are found in various situations ; as in 

 humid spots covered by herbage, rank grass, &c. ; beneath 

 the bark or within the hollows of old trees, crevices of 

 rocks, wails, bones, &c- ; about the drainage of houses, 

 or in the dry season by digging near the roots of trees. 



Early in the morning, especially in rainy weather, is the 

 best time for taking them. The freshwater kinds may be 

 sought for in quiet inlets, on the sides of lakes, rivers, and 

 brooks : the greater number of univalves occur at or near 

 the surface, under the leaves of aquatic plants and among 

 decayed vegetables ; while the bi.^lves and certain uni- 

 valves keep at the bottom, and are often more or less 

 imbedded in the sand or mud, froiii wliich they may be 

 raked into a landing-net. 



With regard to the marine bivalves, rocks, subma- 



rine clay-banks, 

 should be carefu 



piles, 



stones, and indurated sand, 

 jcted for Pho lades. Lithodomu 



and other boring species. If the collector should find 

 any of these perff»rators in the ruins of an ancient temple, 

 or in the remains of any ancient works of art, 

 adhering shells {serpuke for instance) attached to the 

 surface of such works, the specimens become doubly 

 interesting, especially in a geological point of view. In 



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such cases, the situation should be acciiratelv noted, as 

 well as the distance of the perforations from the surface 

 of the sea, either above or below. 



By digging with a wide-pronged fork in sand-banks, at 



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