ON NATURAL HISTORY. 339 



grations, either for the purpose of depositing their 

 spawn, or in search of food. In fact they may 

 almost always be found where food is abundant, 

 feeding on the lower grounds in winter, and re- 

 moving to the upper grounds in summer. 



Fresh water Fish in salt water, and salt-water 

 fish in fresh water, living, breeding and thriving, 

 have been seen in various places in Scotland ; and 

 also in a pond in Guernsey, which has been re- 

 covered from the sea by draining the neck of a 

 narrow isthmus. 



In a former work, I have given some account 

 of a large Spider, found at Hampton Court, there 

 called " the Cardinal. " They are so large that 

 when one was put into a tumbler, the legs reached 

 over the edge of it. They are very swift in their 

 motions, and hunt about for their food. They 

 bite off the wings of moths, and unlike the com- 

 mon spiders, which suck the juices of their prey, 

 they appear to eat the body. They may be heard 

 distinctly when they run along the paper on the 

 walls. They are always found in pairs at least 

 if one is caught, another is sure to be seen directly 

 afterwards. They are most frequently seen in 

 Autumn.* 



* It is a general remark at Hampton Court, that the Cardinal 

 spider makes its appearance previous to wet weather. 



