122 REPORT OF NEW JERSEY STATE MUSEUM. 



terior ventral marg-in, where it joins body, with stout tongue-hke 

 lamella which projects downward at a right angle to ventral 

 surface. Terminal claw three-quarters as long as basal joint, 

 rather slender, with very long hair-like accessory spine on its 

 inner margin. Furca large, base longer and narrower than 

 branches, and both base and branches strongly flattened into 

 fan-like lamellae. Branches nearly twice wide as long, with 

 radiating ridges and lines extending outward from thickened 

 center. Median sinus triangular, branches so widened toward 

 tip as to nearly meet. First swimming-legs with small spine on 

 end of basal joint pointing outward, and much stouter blunt 

 spine on posterior border of same joint pointing backward. 

 Three claws on terminal joint about equal, with serrated lamellae 

 ■along their posterior margins. Second legs with wide rounded 

 flange or wing along outer margin of exopod. Fourth legs 

 stout and four-jointed, basal joint swollen and carries slender 

 flexible hair on its outer margin near distal end. Short curved 

 claw at tip of second joint and longer ones on third and fourth 

 joints, flanged on one or both sides with serrate laminae. Fifth 

 legs distinct and of medium size, plainly visible ventrally, but 

 not so dorsally. Color delicate pinkish-yellow, with small pig- 

 mented spots of a purplish or reddish-brown distributed evenly 

 over entire dorsal surface, so that color uniform throughout. 

 Total length, 7.5 mmi. 



Male. — Carapace as in female, except relatively much larger, 

 five-eighths of entire length. Free thoracic segment consider- 

 ably shortened by overlapping of medium lobe of carapace. Gen- 

 ital segment and abdomen together formi an almost perfect oval, 

 widest end anterior, while it narrows rapidly posteriorly. Gen- 

 ital segment one-third length of carapace, considerably wider 

 than long, squarely truncated posteriorly, furnished with two 

 pairs of papillae, as one on lateral margins one-third distance 

 from posterior end and other pair at posterior corners. In both 

 pairs papillae sharply conical and with quite large plumose setae. 

 Testes very large, elongate-elliptical in shape, and fill nearly en- 

 tire segment. Semen ducts open on posterior ventral surface, 

 on either side of abdomen. Latter and anal papillae similar to 



