﻿A NEW CRAYFISH FROM ALABAMA — HOBBS 213 



three punctations in narrowest part; ceplialothorax markedly granu- 

 late laterally and in the caudal portion of the areola; a single lateral 

 spine present on each side of carapace. Male with hooks on ischi- 

 opodites of third and fourth pereiopods; palm of chela of first-form 

 male not bearded but bearing a row of seven to nine tubercles along 

 inner margin; postorbital ridges terminating cephalad in spines. 

 First pleopod of first-form male with a rounded hump on cephalic 

 margin near distal end, and terminating in four distinct parts: The 

 noncorneous mesial process prominent, acute, and extends caudodistad, 

 and laterad of the otlier tenninal elements ; the small, corneous, acutely 

 triangular cephalic process arises from middistal end of appendage; 

 caudal process corneous, and flattened cephalocauclad, corneous, sub- 

 triangular, and concave in caudal aspect, and closely applied to 

 caudolateral surface of central projection ; central projection corne- 

 ous, slender, and terminating bluntly, directed caudodistad as are 

 cephalic and caudal processes. Annulus ventralis as in figure 82, d^ 

 and sternum immediately cephalad of annulus w^ith multituberculate 

 prominences, which extend caudad to cover portion of annulus. 



Holotypic male^ fortn I. — Body subovate, somewhat compressed 

 laterally; abdomen narrower than thorax (12.9-14.6 mm. in widest 

 parts, respectively) ; width of carapace slightly less than depth in 

 region of caudoclorsal margin of cervical groove (14.6-15.0 mm.). 



Areola moderately narrow, about 7.3 times longer than broad with 

 three punctations in narrowest part, caudal third granulate ; cephalic 

 section of carapace about 2.1 times as long as areola (length of areola 

 about 31.9 percent of entire length of carapace) . 



Margins of rostrum gently converging cephalad, and terminating 

 at base of acumen in a small acute tubercle on each side ; acumen not 

 upturned ; rostrum excavate above and without swollen margins, and 

 studded with many inconspicuous setae arising from very minute 

 punctations. 



Postorbital ridges grooved laterally, and terminating cephalad in 

 acute spines ; subrostral ridges moderately well developed, but evident 

 in dorsal aspect only at base; suborbital angle small and obtuse; 

 branchiostegal spine well defined and acute; sides of carapace with 

 an acute spine on each side. Surface of carapace granulate except for 

 cephalodorsal portion of carapace and cephalic two-thirds of areola 

 which are punctate. 



Abdomen longer than thorax (34.7-31.9 mm.). 



Cephalic section of telson with two spines in each caudolateral 

 corner. Outer dextral spine bidentate. 



E'pistome semiovate with a distinct cephalomedian projection; en- 

 tire margin bearing plumose setae. 



Antennule with a strong spine on ventral surface of basal segment. 



