CAMBARUS. 23 
branchial region, half-way between the areola and the lower border, and 
a whitish longitudinal band on each side of the abdominal somites, these 
bands not reaching to the hind border of the somites. The tubercles of the 
chelz are black, and there are dark spots on the margin of the rostrum. 
Dr. Abbott * states that in Trenton, N. J., this species frequents “ running 
streams which have masses of vegetation growing in them, the animal in 
question resting upon the plants, usually near the surface of the water. We 
have found since our collecting excursions, on carefully approaching clear 
running streams, such as just mentioned, that this crawfish is to be seen 
resting on the plants, always with the head directed above stream. If dis- 
turbed, they would dart backwards down to the roots, apparently, of the 
plant upon which they were sitting. After a lapse of about ten minutes, 
they would return to their former resting-place, creeping up the plant 
down which they had so suddenly darted tail foremost.” 
Mr. P. R. Uhler, in his studies on the distribution of the crayfishes of 
Maryland, finds that this species belongs to the lowlands at the mouth of 
sluggish rivers, or near the ocean in muddy and grassy ditches and drains, 
and even in salt water, in company with C. Ufleri. In his collection are 
specimens from near Ocean City, Worcester Co., Md., found in a ditch in 
holes six to nine inches deep. At Goldsborough, N. C., the same gentleman 
found it abundant in drains and branches running through cotton fields, 
tributaries of the Neuse River. 
CO. Blandingii, var. acuta, attains a very large size. The largest I have 
seen, a male of the first form, is 51 in. in length. The cheliped is 6{ in., the 
chela 3% in. This specimen is in the Museum of Comparative Zodlogy. 
2. Cambarus fallax. 
Plate II. fig. 4. 
Cambarus fallax, HacEn, Ul. Cat. Mus. Comp. Zodl., No. III. p. 45, Pl. I. figs. 103-105, 1870. 
Cambarus fallax, Faxon, Proc. Amer. Acad. Arts and Sci., XX. 136, 1884. 
Known Localities. — Florida: St. John’s River at Jacksonville, Orange Bluff, 
Hawkinsville, Horse Landing, Blue Spring (Coll. Peabody Acad. Sci.), and 
Lake Jessup (Coll. U. S. Nat. Mus.) ; Magnolia (Coll. Boston Soc. Nat. Hist.) ; 
Indian River (Coll. U. S. Nat. Mus., Yale Coll.); Titusville, Brevard Co. 
(Coll. U. S. Nat. Mus.). 
* Amer. Naturalist, VIT. 80. 
