63 
prescribed limits in regard to the distance from land, for the 
remainder of the year. The time now proposed for the res- 
triction of the trawl fishery, is founded on the well known 
habits and seasons of spawning of the fishes most in danger, 
and which are also the most esteemed for the table ; and 
though, after all, it must happen that multitudes will be des- 
troyed, by no other regulation will so large a number be en- 
abled to escape. Facility of conviction must also be regarded 
as an important part of any protective enactment. 
CRUSTACEANS. 
The class of creatures termed Crustaceans, in which are, 
included the families of Crabs, Lobsters and Shrimps, may he 
popularly described as animals without a vertebral internal 
skeleton, but having the body divided into distinct rings move- 
able on each other "by joints ; the integument forming a crust ; 
antennae, or feelers, and eyes separately on footstalks; jaws 
°f numerous jointed portions for chewing, the slit of the mouth 
Perpendicular. The legs with joints, the first pair with hands; 
Vent at the extremity of the body. 
The Stalk-eyed Crustaceans to which our enumeration is 
confined, possess a carapace or shelly crust above the thorax, 
within which the principal organs of life arc protected ; the 
branchiae or gills for breathing, are not branched ; legs at the 
thorax. 
They are arranged by Dr. Milne Edwards, the last Natu- 
ralist who has extensively studied them, in two great sections, 
of which the separate characters are these : 
Decapod stalk-eyed crustaceans, with the 
rings of the head and thorax united into a carapace ; an- 
tennas commonly four; brauchite in a cavity protected and 
concealed by the carapace. 
s TOMAPOD STALK-EYED CRUSTACEANS, destitute 
of thoracic branchiae in interior cavities. 
Decapod, Crustaceans are again divided into three families : 
®R ACHYURES, or Short Tailed Decapods, the tail or more 
properly the abdomen, slightly developed ; without legs 
iormed for swimming, and destitute ot tanlike caudal plates 
A N AMOURS, the abdomen well developed, with a portion 
Permanently bent under the thorax, with terminal eatulal 
plates. 
^tACROURES, the abdomen well d evcloped and extended, 
having paddles beneath, and terminal fanshaped caudal 
plates. 
