NEW CRAYFISHES FROM FLORIDA — HOBBS 409 



mesial process, a subcylindrical, subulate, corneous one, extends 

 caudoventrally at about a 50° angle with the main shaft and does 

 not extend beyond the rest of the terminal processes distally. The 

 cephalic process consists of a very low, noncorneous, knoblike structure 

 bearing a terminal tuft of setae; extending from its mesial margin is 

 a larger, corneous, triangular process which somewhat shields the 

 central projection anteriorly. The central projection, entirely corne- 

 ous, consists of two partially fused processes: A small centrocaudal 

 process (contributed from the lateral base of the knoblike structure) 

 smaller than the centrocephalic process and extending only about 

 halfway to the tip of the latter; the centrocephalic process, somewhat 

 compressed laterally, arises from the center of the appendage, is 

 directed caudoventrally, and is distally deflected at about a right 

 angle with the main shaft. The caudal process is a large, corneous, 

 fanlike structure situated along the distal posterolateral surface. 



Male (form II). — The second-form male differs from the first-form 

 male in a few minor details. Chiefly, the spiny parts are all reduced 

 and the first pleopod bears no corneous tips. 



Female allotype. — Besides the sexual characters, the female shows 

 the following distinctive structures differing from those described in 

 the male: Chelae proportionally smaller; anterior section of telson 

 with three spines in the left and two in the right posterolateral cor- 

 ner; antennae broken but would scarcely have reached the posterior 

 margin of carapace; 8 to 10 spines irregularly spaced along inner side 

 of hand. 



Annulus ven trails movable ; sinus extending from middle of anterior 

 margin posteriorly about one-third of the length of the annulus, 

 bends sharply to the left and slightly anteriorly, then curves gently 

 to the right and posteriorly to the posterior margin, cutting it slightly 

 to the left of the midventral line. A distinct fossa is not present. 

 Just posterior to the annulus a truncate spine is present on the 

 sternum between the fifth pereiopods. 



Measurements. — The holotype: Carapace, height 1.33, width 1.29, 

 length 2.51 cm.; areola, width 0.14, length 0.76 cm.; rostrum, width 

 0.45, length 0.60 cm.; abdomen, length 2.70 cm.; right chela, inner 

 margin of palm 0.90, width of palm 0.90, length of outer margin of 

 hand 2.29, length of movable finger 1 .23 cm. The allotype: Carapace, 

 height 1.28, width 1.18, length 2.54 cm.; areola, width 0.19, length 

 0.76 cm.; rostrum, width 0.42, length 0.60 cm.; abdomen, length 

 2.70 cm.; right chela, inner margin of palm 0.55, width of palm 0.52, 

 length of outer margin of hand 1.40, length of movable finger 0.80 cm. 



Type locality. — A roadside ditch in the flatwoods 1 mUe east of 

 Bonifay, Holmes County, Fla., on State Highway No. 1. About 50 

 yards east of where I collected the type specimens is a cypress pond 

 and swamp. Grasses, Drosera capillaris Poiret, Rhexia sp., and 



