CAMBAEUS. 69 



24. Cambarus latimanus. 



Plate II. Ue. 3. 



? Astacus {Cambarus) Bartonii, Erichson, Aicb. JCaturgescli., XII. Jahrg., I. 97, 1846. 



Astacus latimanus, Le Conte, Proc. Acad. Nat. Sci. Phila., VII. 402, 1S55. 



Cambarus latimanus, Hagen, 111. Cat. Mus. Comp. Zool., No. III. p. 83, PI. I. figs. 43-46, PI. III. fio-. ]62, 



1870. 

 Cambarus lutimanus, Faxon, Proc. Amer. Acad, .irts and Sci., XX. 144, 1SS4. 



Known Localities. — South Carolina : near Columbia (Coll. U. S. Nat. Mus.) ; 

 near Greenville (Coll. Berlin Mns., teste Hagen). Georgia: Athens; Milledge- 

 ville; Roswell. Alabama: Blount Spring and Cullman, Sand Mountain; near 

 Bridgeport (var.). Mississippi : Ocean Springs. Tennessee : near Ashland 

 City, Cheatham Co. (var.). 



Erichson's types of C. Bartonii in the Bei'lin Museum were examined by 

 Dr. Hagen in September, 1870. They consist of a male of the second form 

 and a young female collected by Cabanis in the upper part of South Caro- 

 lina, near Greenville. Hagen considered them both to be young C latima- 

 nus. A large G. Diogenes, from St. Louis, Mo., with a deformed rostrum, in 

 the same museum, was also labelled Astacus Bartonii by Erichson. 



There is a type, male form I., of Le Conte's A. latimanus- in the Museum 

 of Comparative Zoology, and another, a female, in the Philadelphia Academy. 

 Two specimens from South Carolina in the Museum of Comparative Zoology 

 were received from Dr. Lewis R. Gibbes as "Astacus Bartonii Fab." 



One male specimen, in the same jar with C. latimanus, from Athens, Ga., 

 has a rather broad areola, and seems to be a form of C. Bartonii, rather than 

 of C. latimanus. 



Mr. C. L. Herrick collected small specimens at Ocean Springs, Miss., on 

 the Gulf of Mexico, which appear to be this species, but its favorite habitats 

 are the higher regions at a distance from the coast. 



In specimens from Blount Spring and Cullman, Ala., the areola is some- 

 what narrower than in the types from Georgia ; and in those received 

 through the U. S. National Museum from Bridgeport, Jackson Co., Ala., and 

 Ashland City, Cheatham Co., Tenn., the areola is almost reduced to a line in 

 the middle, the metacarapace is longer in proportion to the procarapace, the 

 fingers are shorter, the tuberculation of the hand weaker, the epistoma 

 narrower and less sharply truncate. In the typical specimens from Georgia 

 the distance from the cervical groove to the hind margin of the carapace 

 is equal to the distance from the cervical groove forwards to the middle of 



