
MARINE AQUARIA 

segments and a terminal flap or telson. Below the carapace there are five 
segments corresponding to the pairs of legs, of which the anterior pair 
bear the claws. Each segment of the abdomen has a pair of appendages 
on the lower side, the swimmerets, and the telson has two larger ones termi- 
nating in two broad plates. The eyes are on two short movable ped- 
uncles and there are two long and two short antenne or feelers. The 
American Lobster is variable in color, usually darker green and bluish on 
the carapace with the under side and the limbs of a lighter color; that of 
the adult is usually a greenish black, but the color depends upon the 
character of the bottom which it inhabits. Its range is from Labrador 
to Delaware and Virginia, but it occurs most numerously from Massa- 
chusetts northward, as it prefers a rocky and gravelly bottom covered with 
a growth of the larger seaweeds. Of the Atlantic species there are but 
two varieties, known to fishermen as the School Lobster and the Rock 
Lobster. One other species, Panulirus interruptus, (Rand.), also classified 
as Senex interruptus, the California Spring Lobster, is a smaller form, rang- 
ing southward from California, and is similar to the European P. vualgarus. 
SHrimps and Prawns. ‘These animals have compressed bodies and 
soft carapaces with the abdomen large in comparison with the combined 
head and thorax. ‘The difference between the Shrimps and Prawns is not 
well defined, as they are nearly related forms. In France they are known 
as Crevettes and in Germany as Garnellen. 
Crangon vulgaris, (Fabr.), or Common Sand Shrimp, reaches a 
length of two inches, and varies in color with the character of its habitat, 
from pale translucent grey, to resemble the surface upon which it lives, to 
darker colors and mottlings on a muddy bottom. It secretes itself so that 
only the eyes and antenne are visible, and buries itself when disturbed. 
Abounds from Labrador to North Carolina between tide-marks, princi- 
pally on weedy bottoms. 8B. franciscorum is the California species. 
Penaeus setiferus, (M-E.), the largest Southern Shrimp of the mar- 
kets, ranges from Charleston, S. C., south. P. drasiliensis is another form 
from the same locality. 
Squilla empusa, (Say.), or Mantis Shrimp, is a larger deepwater species 
belonging to the Squillide, and is similar to the Squilla of Europe. It 
somewhat resembles the lobster and is 6 to 10 inches in length. Its range 
is from Cape Cod to Florida, and is rarely found near the shore. 
Palemonetes vulgaris, (Stimp.), or Common American Prawn, is usu- 
ally one inch long, but reaches a length of 1% inches, and occurs abun- 
dantly along the Middle Atlantic coast. The body is almost colorless 
and transparent, marked by irregular spots and blotches of grey and 
brown. It is the “ bait”? shrimp of the angler, and inhabits both salt and 
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