GENUS PALyEMON. 



301 



Palamon Carcinus, for instance, sometimes reaches to nearly 

 a foot in length, and P. Jamaicensis is nearly as large. 

 The common prawn, P. serratus, is the species best known 

 and most esteemed in our climate ; but a very careful 

 examination of all the means within my reach, has es- 

 tablished in my mind, very satisfactorily, the existence of 

 four distinct British species of Palfemon^ forming one ad- 

 ditional to those before denned. 





