CRAYFISHES. 397 



Carolina.' It thus appears that Mr. Mooney's crayfish came from a region not 

 far remote from the type locality of C. carolinus. 



In this specimen (U. S. N. M., No. 14,31-4), which displays the normal fea- 

 tures of C. carolinus, as I believe, the rostrum is narrower than in C. dubius 

 and less quadrangular in outline; the anterior process of the epistoma is much 

 broader and more triangular in outline, the sides converging much more between 

 the base and the truncated anterior angle; the carpus is armed with a prominent, 

 acute, internal median spine, immediately behind which and at a little lower level 

 lies a very small spiny tubercle; posteriorly to this, not far from the inner articu- 

 lation with the merus, lies another distinct spine, smaller than the internal 

 median spine; the lower face of the carpus bears one tubercle al)out half-way 

 between the internal median spine and the outer articulation with tlie propodus ; 

 the lower face of the merus shows the biserial arrangement of spines as in C. 

 dubius, as many as five or six spines adorning the external edge of the segment ; 

 the distal segment of the outer branch of the last pair of abdominal appendages 

 is shorter and broader (less oval in contour) than in C. dubius. The living color 

 of this specimen, as is shown by a MS. note accompanying the specimen, was 

 red, the color of C. dubius also. 



A large number of specimens in the II. S. National Museum collected at 

 various places in the southwestern part of West Virginia (Nos. 28,591-28,596, 

 28,598-28,600, Horsepen Creek, War Creek, BaileysviUe, Lashmeet, Barranche 

 Creek), agreeing in most respects with the typical C. dubius from northern West 

 Virginia and Pennsylvania tend to develop the accessory carpal spines and 

 tubercles of C. carolinus. 



Three specimens (male, form I.) in the U. S. National Museum, No. 

 22,386, from a tributary of Stone River twenty miles from Columbia in cen- 

 tral Tennessee are interesting. They agree in most respects with C. c. dubius, 

 but the rostrum is a little narrower, with more convergent margins, the rostral 

 acumen is less abrupt, and the outer liorder of the hand is rounded off with- 

 out much indication of serrature. In these regards the specimens agree with 

 the typical carolinus; the carpus, however, is very smooth, bearing no spines 

 except the internal median, as in C. c. dubius. The outer inferior row of spines 

 on the merus is present, though slightly developed. The branchio-cardiac 

 lines are in closer contact than in any other specimens of this species that I 

 have seen, reducing the areola to a narrow line. 



'See Myths of the Cherokee, bj- James Moouey, Nineteenth Ann. Kept. Bureau Ainer. Ethnol. 

 1897-98, 1900, p. 308. 



