422 PROCEEDINGS OF THE NATIONAL MUSEUM >^, 89 



of the small acute platelike spine, the other two parts of this caudal 

 process being represented by a rounded ridge across the postero- 

 distal surface of the appendage. 



Female allotype. — Essentially^ like the male, form I, but rostnim 

 extending beyond peduncle of antennule and right antennal scale; 

 also extending anteriorly about the same distance as left antennal 

 scale. Anterior section of telson with three spines in each postero- 

 lateral corner. Epistome as in the male, form II. Merus of first 

 pereiopods with two very large acute spines on ventrolateral margins 

 surrounded by several smaller ones. Also one large acute spine on 

 the anterior mesioventral surface. 



Annulus ventralis subelliptical. Two prominent ridges directed 

 obliquely, posterolaterally on antero ventral surface. Sinus arises 

 slightly back of anterior edge along the midventral line, curves 

 immediately to the left, then gently back to the midventral line, 

 where it extends posteriorly, bisecting a rather large tubercle which 

 extends caudad from the main body of the annulus. The sternum 

 immediately posterior to the annulus is modified into a semi elliptical 

 structure with a raised anterior margin bearmg many small tubercles. 



Between the third and fourth pereiopods along the midventral line 

 is a small subovate structure (resembling vaguely the annulus) bear- 

 ing several ridges and depressions. In the same relative position 

 between the second and third pereiopods is a large, bituberculate 

 structure projecting ventrally. 



Measurements. — The holotype: Carapace, height 1.69, width 1.65, 

 length 3.73 cm.; areola, width 0.42, length 1.12 cm.; rostrum, width 

 0.58, length 1.25 cm.; abdomen, length 4.25 cm.; right chela, inner 

 mai'gin of palm 1.30, width of palm 0.71, length of outer margin of 

 hand 2.71, length of movable finger 1.41 cm.; carpus of right first 

 pereiopod, length 0.96, width 0.54 cm. The allotype: Carapace, 

 height 1.29, width 1.29, length 2.92 cm.; areola, width 0.32, length 

 0.75 cm.; rostrum, width 0.50, length 1.06 cm.; abdomen, length 3.33 

 cm.; right chela, inner margin of palm 0.60, width of palm 0.45, 

 length of outer margin of hand 1.44, length of movable finger 0.81 

 cm.; carpus of right first pereiopod, length 0.60, width 0.37 cm. 



Type locality. — A small, swift swamp stream about 2 miles south- 

 west of Green Cove Springs, Clay County, Fla., on Highway No. 48. 



The specimens were collected on April 23, 1938. 



The male holotype (form I) and the female allotype (No. 76596) 

 and a male paratype (form II) are deposited in the United States 

 National Museum. Of the paratypes, a male (form I), a male (form 

 II), and a female have been deposited in the Museum of Compara- 

 tive Zoology; a male (form I) and a female in the University of 

 Michigan Museum of Zoology; five males (form I), one male (form 



