SUBSPECIES OF CAMBARUS LONGULUS — JAMES 



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row of tubercles. Dactyl convex mesially along proximal two-thirds 

 and without ridges or grooves. Concave opposable margin with row 

 of 18 rounded corneous tubercles and distal third with a row of minute 

 denticles ventral to tubercular row. 



Carpus of right pereiopod longer than broad (14.0-10.5 mm.), with 

 a deep longitudinal furrow above. Dorsal and lateral siu-faces 

 punctate; mesial surface with one large spinous tubercle near mid- 

 length and a much smaller one proximally; ventral surface wdth two 

 tubercles on distal margin. 



Merus of first right pereiopod punctate laterally and mesially. A 

 small tubercle near upper distal margin. Lower surface with a row of 

 eight tubercles mesially (the two most distal enlarged and spinous), 

 and two laterally. 



Hooks on ischiopodites of third pereiopods only (fig. 1^); hooks 

 heavy and projecting proximaUy a little beyond distal end of 

 basipodite. Coxae of fourth pereiopods with caudomesial swollen 

 prominences. 



Figure 2. — a. Saddle pattern of "orange phase" of Cambarus longulus longirostris from 

 Lawrence County, Tenn.; ^, saddle pattern of the less colorful phase of C. longulus lo7igtros- 

 tris from Hiwassee drainage system in Polk County, Tenn.; c, a mottled phase of C. I. long- 

 ulus from Dan River headwater (map 2, no. 70). 



First pleopod reaching coxopodite of thh'd pereiopod when abdomen 

 is flexed. Tip terminating in two parts (figs. 2a, c) ; mesial process 

 bulbous, noncorneous, bent caudolaterally and bearing a minute spine 

 at its tip. Slight shoulder on lateral surface arising gradually from 

 base of central projection. 



