CLASS VI. ORDERS II. TO V. 95 
ORDERS SECOND TO FIFTH. 
Head distinct from the trunk. 
Remark. These four orders of Latreille musi 
be united, if we retain the old Linnean genera, as 
adopted by Shaw, according to the plan of this 
text-book. 
Squii.a, tail longer than the thorax; each man- 
dible bears a feeler ; eyes pedicelled and movea- 
ble. 
Oniscus, (sow-bug,) legs fourteen; antenne 
setaceous ; body oval. 
MonnocuLus, (swimming-bug,) feet formed for 
swimming ; body covered by a crustaceous tegu- 
ment; eyes, in most species, approximated and 
imbedded in the shell. 
