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 antennae 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. vulgarus. 



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 antennae are visible, and buries itself when disturbed. 

 Abounds from Labrador to North Carolina between tide-marks, princi- 

 pally on weedy bottoms. B. franciscorum is the California species. 



Pen<£us setiferus, (M-E.), the largest Southern Shrimp of the mar- 

 kets, ranges from Charleston, S. C, south. P. brasiliensis is another form 

 from the same locality. 



Squilla empusa, (Say.), or Mantis Shrimp, is a larger deepwater species 

 belonging to the Squillidae, and is similar to the Squilla of Europe. It 

 somewhat resembles the lobster and is 6 to lo inches in length. Its range 

 is from Cape Cod to Florida, and is rarely found near the shore. 



PaUmonetes vulgaris, (Stimp.), or Common American Prawn, is usu- 

 ally one inch long, but reaches a length of i % 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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