98 
INSTRUCTIONS FOR 
possible that some make their appearance only 
in the evening and night. The fishermen, 
oyster dredgers, and shrimp -catchers should be 
requested to preserve any which they may drag 
up; and the different fish brought to market 
should be examined. By this means rare and 
interesting species may be obtained. Some of 
these animals are extremely local, and the 
collector should be careful not to neglect the 
opportunity of taking a sufficient quantity, 
however plentiful they may appear. 
The best plan for collecting small Crustacea 
is to put them into a wide mouthed bottle, 
half filled with equal parts of spirits and water. 
A gooseberry bottle will answer the purpose. 
The larger crabs, &c. should have their claws 
tied, to prevent their injuring each other, and 
may then be put into a bag. Those found 
near the sea, may be killed by being put into 
cold fresh water, and should remain some 
hours to extract the salt. The fresh water 
species are easily killed by being plunged into 
spirits of wine. Large specimens require to 
have the flesh removed ; this may be done by 
separating the thorax from the body, and cut- 
ting out the flesh with a crooked instrument. 
The claws can only be cleared by breaking a 
hole on the underside. The parts should then 
