CAMBARUS. 29 
6. Cambarus maniculatus. 
Astacus maniculatus, Lu Contr, Proc. Acad. Nat. Sci. Phila., VII. 401, 1855. 
Cambarus maniculatus, Hacen, Ill. Cat. Mus. Comp. Zodl., No. III. p. 52, 1870. (After Le Conte.) 
Cambarus maniculatus, Faxon, Proc. Amer. Acad. Arts and Sci., XX.187, 1884. (After Le Conte. No 
description.) 
This species is known only from the description of Le Conte, which is 
quoted in full on page 52 of Hagen’s Monograph. The description was 
perhaps drawn up from an immature specimen of C. ¢roglodyles. The num- 
ber of hooked thoracic legs in the male is not specified in Le Conte’s deserip- 
tion, but the species is probably one of the C. Blandingii group, since it is 
placed among the species of that group in Le Conte’s list. 
7. Cambarus Lecontei. 
Plate II. fig. 2. 
Cambarus Lecontet, Hacen, Ul. Cat. Mus. Comp. Zodl., No. III. p. 47, Pl. I. figs. 15-18, Pl. III. fig. 145, 
1870. 
Cambarus Lecontei, Faxon, Proc. Amer. Acad. Arts and Sci., XX. 137, 1884. 
Known Localities. — Alabama: Mobile. Georgia: Athens. 
Resembles C. Blandingti and C. fallax, but is easily distinguished from 
these by the shortness of the portion of the carapace behind the cervical 
groove, the greater length of the acumen of the rostrum, antennal scale, and 
chela, and the shape of the male sexual appendages. The areola is some- 
what wider. The rostrum is deeply excavated above, the sides converging 
but slightly up to the lateral teeth, which are separated by more than one 
half of the width of the base of the rostrum. The proximal segment of the 
telson is armed on each side of its distal margin with three or four teeth. 
The proportions may be seen from the following measurements of a male, 
form I.: Length of body, 86 mm.; of carapace, 45 mm.; of abdomen, 48 mm. 
From tip of rostrum to cervical groove, 31 mm.; from cervical groove to 
posterior border of carapace, 12 mm. Length of rostrum, 14 mm. ; of acu- 
men, 5mm. Breadth of rostrum at base, 7 mm.; at lateral spines, 4 mm. 
Breadth of areola, 24 mm. Length of chela, 40 mm. ; breadth, 8 mm. 
Smaller specimens are more characteristic on account of a greater propor- 
tional breadth of the areola and shortness of posterior portion of the carapace. 
In a male, form IL., 65 mm. in length, the length of the carapace from the 
tip of rostrum to cervical groove is 24 mm.; from cervical groove to poste- 
rior border of carapace, 8.5 min. Breadth of areola, 2 mm. 
