Dccapoda — Macriira. 



00 



under the name of " Dill )liii Prawn," althou_t;li the cliid' sujiplios Talll(•-(■a^ 

 now come from Scotlantl and the North-Kast of England, not, as ^"- "'■ 

 formerly, from tlie Irish Sea. In connection with the jiamc; 

 " Norway Lol^ster " used for this species, it should he reniemhered 

 that the common Lohster is ahundant on the coasts of Norway, 

 and tliat lar^e quantities are exported thence to En<>land. 



In the true Crayfishes, which helon<f to two faniili(>s inlialjitin^' 

 respectively the fresh waters of the NortluM-n and SouLhei'n Ilenii- 



FiG. :J5. 

 Astacoi^sis fraiikiiiiii, about Itli natural size. [Wall-case No. 5.] 



spheres, the last thoracic sternite is movalile. In ihe Nortliern 

 Crayfishes, helonging to the family Afiiacidac, tlie male has sexual 

 appendages on the ahdomen. 



The largest of the Crayfishes found in Western Europe, and 

 the most highly esteemed for food, is the " Eed-clawed Crayfish," 

 Astacus fluviatilis (French, " Ecrevisse a pattes rouges," German, 

 " Edelkrel)s "), found in France, Germany, Austria, N.W. Kussia, 

 S. Sweden, Denmark, &c. iVlthough the name .4. fluviaiiUs is 

 sometimes applied to the English Crayfisli, it is more correctly 

 restricted to the Rod-clawed species, wliit^h does not occur in the 

 British Islands, 



