CAMBARUS. 69 
24. Cambarus latimanus. 
Plate II. fig. 3. 
? Astacus (Cambarus) Bartonii, Wricuson, Arch. Naturgesch., XII. Jahrg., I. 97, 1846. 
Astacus latimanus, Le Contr, Proc. Acad. Nat. Sci. Phila., VII. 402, 1855. 
a ris Hacen, Ill. Cat. Mus. Comp. Zodl., No. III. p. 83, Pl. I. figs. 43-46, Pl. IIT, fig. 162, 
Cambarus Tieainas Faxon, Proc. Amer. Acad. Arts and Sci., XX. 144, 1884. 
Known Localities. —South Carolina: near Columbia (Coll. U. 8. Nat. Mus.) ; 
near Greenville (Coll. Berlin Mus., este 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.). 
Krichson’s types of C. Barton in the Berlin 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. daima- 
nus. A large C. 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. ladimanus in the Museum 
of Comparative Zoblogy, and another, a female, in the Philadelphia Academy. 
Two specimens from South Carolina in the Museum of Comparative Zodlogy 
were received from Dr. Lewis R. Gibbes as “ Astacus Bartonii Fab.” 
One male specimen, in the same jar with C. daimanus, from Athens, Ga.,_ 
has a rather broad areola, and seems to be a form of C. Barton, rather than 
of C. datimanus. 
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 
