166 GENUS ASTACUS. [December, 



imate European one. Under the trivial name here adopt ^ 

 ed he has figured it in his large work. There is no doubt 

 but they are exceedingly similar, and it is probable that 

 at the first view no one would suppQse tliem distinct; but 

 if we may rely on the laconic descriptions which have been 

 given of the gammarus, there are certain traits of diffe- 

 rence^ sufficient to authorize a separation of the species. 

 The gam77iarus is said to have a double tooth or spine 

 each side of the base of the rostrum, the rostrum itself 

 has four or more teeth each side, the bands have four, live, 

 or six spines on the inner edge; in our species the teeth at 

 the base of the rostrum, are small and simple, the rostrum 

 is two or three toothed each side, and the inner edge of 

 the bands six to nine spined. 



The Linnaean name gammariis was rejected by Fabri- 

 cius, and marinus was substituted in its stead. Notwith- 

 standing this authority. Dr. Leach has, and, I think with 

 great propriety, restored the name applied by Linne, inas- 

 much as it was given and published prior to that of the 

 Entomologist of Kiel, and this reason, if the word be any- 

 wise admissible, according to the rules of the science, is I 

 should conceive, ample of itself. The term marinus, as 

 applied to the European species, being thus rejected^ I 

 have adopted it agreeably to the intention of Seba, for the 

 one here described. 



This is the Lobster of our markets; it is brought in 

 considerable numbers to Philadelphia, in the fish wag- 

 ons, from Long-branch, part of the coast of New- Jersey, in 

 excellent preservation, and generally alive; they are much 

 esteemed as food, and are sold at 18 cents per. lb. They 

 are taken pretty much in the same manner as at the fisheries 

 on the coast of Great Britain, by means of pots or traps, 



