33 

 Fam. : Nephropsidae. 

 Gen. : ASTACUS, Leach. 



1814. Astncus, Leach, Edinb. Encycl., vol. 7, p. 398. 



18 15. Astacus, Leach, Trans. Linn. Soc. London, vol. 11, 



P- 343- 



18 16. AstacuSy ].each, Encycl. Brit., Art. Annulosa, p. 420. 

 1819. Astacus, Leach in Samouelle's Entomologist's Useful 



Compendium, p. 95. 

 1825. Astactis, Desmarest, Consid. gen. Crust., p. 209. 

 1829. Astacus, Latreille, Le Regne Animal, vol. 4, p. 88. 

 1837. Homarus, Milne-Edwards, Hist. Nat. Crust., vol. 2, 



P- 333- 

 1847, Hofnarus, White, List of Crustacea in Brit. Mus., p. 72. 

 1850. Astacus, White, List of British Animals in Brit. Mus., 



Crust , p. 35. 



1852. Homarus, Dana, U.S. Expl. Exp., vol. 13, part 1, 



p. 523, part 2, p. 1558. 



1853. Homarus, Th. Bell, British Stalk-eyed Crustacea, 



p. 241 (part published not later than 1850, since it is 



quoted by White in that year). 

 1857. Astacus, White, Popular History of British Crustacea, 



p. lOI. 

 1875. Astacus, Sowerby, Continuation of Leach's Malac. 



Podophth. Brit., text to t. 35. 

 1 88 1. Homarus, Huxley, The Crayfish, Intern, sci. ser., 



vol. 28, p. 13, etc. 

 1888. Homarus, Bate, Challenger Macrura, Reports, vol. 24, 



p. 192. 

 1893. Astacus, Stebbing, History of Crustacea, Intern, sci. 



ser., vol. 74, p. 201. 



1895. Homarus, Herrick, The American Lobster, Bulletin 



U.S. Fish Commission, p. 8. 



1896. AstacTis, Ortmann, Zoologische Jahrbiicher, vol. 9, p. 



429. 

 1896-7. Homarus, F. J. Bell, Annals and Magazine Nat. 

 Hist., ser. 6, vol. 18, p. 476, vol. 19, Feb. 



1897. Astacus, Stebbing, Annals and Magazine Nat. Hist., 



ser. 6, vol. 19, pp. 120, 353?^ 470- 



1898. Astacus, Stebbing, Natural Science, vol. 12, p. 239. 



Leach in his early restriction of the genus Astacus retained 

 in it three species, the Common Lobster, the Common River 

 Crayfish and the Norway Lobster. He presently separated 

 from it the genus Xephrops for the last of the three, assigning 

 the other two to separate sections of Astacus. But eventually 

 he left the lobster alone in Astacus, forming a new genus 

 Potamohuis for the fresh water crayfish. 



