OF ARTS AND SCIENCES. 143 



? Astacus pusillus, Rafinesque, op. cit, p. 42. 



Astacus Bartonii, Say, Journ. Acad. Nat. Sci. Phila., I. 167. 

 Dec, 1817. 



Astacus Barionii, Harlan, Med. and Phys. Res., p. 230, fig. 3. 

 1835. 



? Astacus affinis, Milne Edwards, Hist. Nat. Crust., II. 332. 

 1837. 



Astacus Bartonii, Gould, Rep. Invert. Mass., p. 330. 1841. 



Astacus Bartonii, Thompson, Hist. Vermont, Part I. p. 170. 

 1842. 



Astacus Bartonii, De Kay, Zool. N. Y., Part VI., Crustacea, 

 p. 22, PI. VIII. fig. 25. 1844. 



Gamharus Bartonii, Girard, op. cit., p. 88. 1852. 



Cambarus montanus, Girard, op. cit., p. 88. 



? Camharus lonyulus, Girard, op. cit., p. 90. 



? Camharus pusillus, Girard, op. cit., p. 90. 



Cambarus Bartonii, Hagen, op. cit., p. 75, PI. I. figs. 47-50, 

 PI. II. figs. 185-139, PI. III. fig. 166. 1870. 



Cambarus Bartonii, Abbott, op. cit., p. 80. 1873 (habits). 



Hab. New Brunswick ; Province of Quebec ? Maine, Ver- 

 mont, Massachusetts, New York, New Jersey, Pennsylvania, 

 Maryland, District of Columbia, Virginia, West Virginia, North 

 Carolina, Ohio, Indiana, Lake Superior, Kentucky, Tennessee. 



In the Museum of Comparative Zoology are specimens of 

 C. Bartonii labelled, "Osage River, G. Stolley " (No. 183) ; but 

 this locality is marked by Dr. Hagen as being very doubtful. 

 Another specimen (No. 3358) is ticketed, "Charleston, S. C. ?" 

 and three specimens (No. 1101) in the same jar with an Alpheus 

 are marked, " Pico, Azores, Miss O. Dabney, May 23, 1860." The 

 latter locality, at any rate, is doubtless erroneous. Hagen states that 

 he has seen a specimen from Georgia, and I find in the collection 

 of the Boston Society of Natural History this species in the same 

 bottle with a Pagurus and Hyas coarctatus, labelled, " Savannah, 

 Ga., Dr. H. Bryant." The presence of the marine forms, especially 

 the Northern Hyas, casts doubt on the correctness of the label. 



As might be expected of a species with such a wide geographi- 

 cal range, C. Bartonii presents many variations of form. 



23. Cambarus robustus. 



Cambarus robustus, Girard, op. cit., p. 90. 1852. 

 Cambarus robustus, Hagen, op. cit., p. 80, PL HI. fig. 167. 

 1870. 



