396 CRAYFISHES. 



Mr. C. F. Baker has sent me a fine lot of C. Intimanus from Auburn, Ala., 

 among them specimens that have attained a length of four inches. 



Cambarus carolinus Erichson. 



This species was described in 184G (Arch. Naturgesch., 12, 1, p. 9G). Erich- 

 son's type, a male of the first form, is preserved in the Berlin Museum. It was 

 collected by Dr. Cabanis, who assured Dr. Hagen that all the crayfishes that he 

 collected in the United States came from a rivulet in a plantation called Tiger 

 Hall, near Greenville, S. C In 1902 Mr. W. P. Hay procured from Dr. Johann 

 Thiele of Berlin a photograph of the type specimen together with drawings of 

 the right claw and first and second abdominal appendages. By means of this 

 photograph and the drawings Mr. Hay identified the species with the crayfish 

 which I described in 1884, from Cranberry Summit (now Terra Alta), Preston 

 Co., W. Va., under the anme of Cambarufi dubius (see Hay, Proc. Biol. Soc. 

 Washington, 15, March 5, 1902, p. 38. 



By the courtesy of Mr. Hay I have before me Dr. Thiele's photograph and 

 drawings of Erichson's type, and find that, although it nearly resembles C. dubius, 

 yet it presents some different characters. The carpus is armed on its inner 

 margin with two prominent, acute spines; of these the larger, anterior one is 

 the so-called internal median carpal spine; on the left cheliped tlie photograph 

 reveals a tubercle just behind, and at a lower level than, the median spine. 

 In C. dubius there is but one carpal spine, the internal median. Furthermore, 

 the outer margin of the hand of C. carolinus, as shown in Dr. Thiele's drawing, 

 is rounded off and lacks the subserrate ridge characteristic of C. dubius; in this 

 regard the hand of C. carolinus appears to be like that of C. monongalensis 

 Ortm. 



No. 14,314, U. S. N. M., male, form I., "among the Cherokees, James 

 Mooney," agrees closely with the i)ictures of Erichson's type, and may be con- 

 sidered a typical C. carolinus. In a notice of this specimen as C. dubius in 1890 

 (Proc. U. S. Nat. Mus., 12, p. 024), I erred in ascribing it to the Indian Territory. 

 I am advised by Mr. Mooney that it was in reality obtained in Swain Co. or 

 in .lackson Co., N. C, among the Eastern Cherokees, — a remnant of the Nation 

 which eluded deportation in 1838 and still clings to the old home in western North 



' Mr. W. P. Hay (Proc. Biol. Soc. Washington, 15, p. 3S, 1902) has unfortunately given this local- 

 ity as western Norlh Carolina, and has been followed in this error by Mr. J. A. Harris (Kansas Univ. 

 Sci. Bull., 190,3, 2, p. 81, 142, 154). 



