NEW CRAYFISHES FROM FLORIDA — HOBBS 405 



Male {form II) . — The second-form male differs from the male, form 

 I, in the following points: The antennae extend beyond the tip of 

 telson, epistome resembles a minaret in silhouette; the rostral spines 

 are normal; however, the acumen bears a spine on the right margin 

 and the right subrostral ridge bears four acute, anteriorly projecting 

 spines, and the left, one; hooks on ischiopodite of both third and fourth 

 pereiopods reduced but prominent; all terminal processes of the first 

 pleopod are noncorneous and reduced. Particularly is this true of 

 the cephalic process. 



Female allotype. — The shape of the rostrum more nearly approaches 

 that of Cambarus lucifugus lucifugus than does the rostrum of the 

 holotype; also the acumen is relatively shorter; the rostral spines are 

 normal. Antennae extending posteriorly to middle of telson. Epi- 

 stome as in holotype except anteromedian spine is much more promi- 

 nent. Anterior section of telson with one spine in the left and two in 

 the right posterolateral comer. 



Annulus ventralis bearing a prominent ridge along the anterior 

 margin on either side of the median line. Sinus originates on the 

 anterior margin on about the midventral line and extends to the left 

 for a short distance, then turns gently to the right to the midventral 

 line, following it for a short distance to a large tubercle, which arises 

 from the posteromedian surface. Posterior to the annulus and between 

 the fifth pereiopods, the sternum is modified into a rounded promi- 

 nence bearing punctations. The sternum immediately anterior 

 to the annulus is plain. 



Measurements. — The holotype: Carapace, height 1.87, width 1.52, 

 length 3.44 cm.; areola, width 0.12, length 1.30 cm.; rostrum, width 

 0.42, length 0.87 cm.; abdomen, length 3.54 cm.; right chela, inner 

 margin of palm 1.14, w^idth of palm. 0.63, length of outer margin of 

 hand 3.41, movable finger 2.15 cm.; carpus of first right pereiopod, 

 length 0.76, width 0.50 cm. The allotype: Carapace, height 1.40, 

 width 1.57, length 3.52 cm.; areola, width 0.14, length 1.35 cm.; 

 rostrum, width 0.43, length 0.85 cm.; abdomen, length 3.58 cm.; right 

 chela, mner margm of palm 0.84, width of palm 0.47, length of outer 

 margin of hand 2.56, movable finger 1.57 cm.; carpus of first right 

 pereiopod, length 0.79, width 0.40 cm. 



Type locality. — A small cave. Hog Sink, about 10 miles west of 

 Gamesville, Alachua County, Fla. The cave is located in high pine- 

 woods ow^led by the Cummer Lumber Co., and it is very difficult to 

 find, as no road leads to it. The cave extends downward 25 to 35 feet 

 and then to the north about the same distance. The greater portion 

 of it is occupied by a pool of clear, cool water, with a pH of 7.1. The 

 pool is shallow at the south and slopes gently deeper to the north. 

 Light reaches the southern edge of the pool, but the northernmost 

 edge is dark. The specimens were taken on November 30, 1937. 



