THE CRUSTACEA OF NEW JERSEY. 385 



Description. — Carapace as seen above broadly ovoid, thick, nar- 

 rowed greatly anteriorly to long, triangular and pointed rostrum. 

 Surface covered with more or less conspicuous large wide-set 

 tubercles, between which are set some smaller ones, and on lateral 

 or branchial region tubercles assume more or less longer and 

 conic form. Posterior edge of carapace rather evenly rounded. 

 Upper surface of carapace all more or less velvety, though along 

 anterior edges becoming more or less conspicuously villose. Body 

 in lateral profile nearly ovoid or ellipsoid, becomes somewhat 

 attenuated anteriorly, and deepest part a little over half width 

 of carapace. Eye-socket small, little developed, rounded, with 

 well-developed supraorbital tubercle, also a postorbital and two 

 infraorbital tubercles. On each side of carapace seven large 

 well-defijied conic tubercles. Eye small, rounded convexly at 

 ends, and stalks short, mobile, and bases little constricted. Ros- 

 trum very conspicuous, large, strongly bifid at tip, where curved 

 slightly inferiorly. First antennas larger, inferior below ros- 

 trum, below which they fold and are more or less concealed, only 

 separated by narrow low deeply-set partition. Basal joint of 

 first antennae well developed, peduncle terminated in slender 

 flagellum and tuft of setae, and well directed or bent upward to 

 form distal joint. Second antenn?e lateral, or spring from each 

 side of rostral base, though not extending forward much beyond 

 rostrum tip, basal joint well developed or nearly half its entire 

 length, and end a slender flagellum narrow to pointed tip. Man- 

 dibles strong, well developed, with slender incurved palp joined 

 to upper edge. First and second maxillse broadly laminar, palps 

 and exopodites of both also well developed. First maxillipeds 

 with well-developed exopodites. Second maxillipeds broad, vel- 

 vety over their external surfaces, and formed as doors to buccal 

 mass. Other limbs mostly similar. Chelipeds not more enlarged 

 than legs, though well developed, and with inner edges of forceps 

 finely dentated with a single series of tubercles along each one. 

 First pair of ambulatory legs longest, similar to others, last pair 

 shortest, and second a little longer than third. All legs, except 

 chelipeds, monodactylous, and dactyli curved, conic, and velvety 



25 MU 



