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NATURAL HISTORY. 



Family VI. Crangomdce. (Gr. Kpayyuv, a Shrimp.) 



CEAXGON. 

 Family VIII. Pakemonidse. (Gr. TLahaijuuv, a proper name.) 





Vulgaris (Lat. common\ the Shrimp. 



Serratus (Lat. toothed, jagged), the Prawn. 



These two animals are so familiar to every one as to need 

 but little description. Both are taken in nets swept along the 

 sandy bottom of the sea. The chief distinction in the appear- 

 ance of these two creatures is the serrated or toothed ridge 

 which runs along the back of the head or rather carapace. 

 When in their natural state, they are of a brown colour, and 

 only assume the pinkish hue when boiled. Spirits of wine has 

 the same eflect. 



The Fresh-Water Shrimp (Gammarus Pulex), and the 

 Water-Flea (Daphnia Pulcx), both so common in our rivers 

 and ponds, are placed among the Crustacea). 



