THE CRUSTACEA OF NEW JERSEY. 265 



formed of five segments. Mandibles with palp formed of three 

 segments. Frontal lamina large, conspicuous, with V-shaped 

 raised edge pointing anteriorly. First thoracic segment twice 

 length of others. Epimera not distinct from segments, but 

 lighter area and slight depression marks place of coalescence. 

 Lateral edges straight, with outer post-lateral angle slightly 

 produced. Abdomen formed of two segments, first long as first 

 thoracic segment, with three suture lines on either side to in- 

 dicate as many coalesced segments. Terminal segment with 

 anterior convex portion surmounted with transverse row of 

 three tubercles, middle one being in median longitudinal line. 

 Contour of terminal segment somewhat triangular, with bluntly 

 rounded apex produced, sides of end folding under to form 

 groove, latter incomplete on ventral side. Immovable inner 

 branch of uropoda extend two-thirds length of terminal seg- 

 ment, and truncate at end. Movable outer branch of uropoda as 

 wide and long as inner branch, its outer posterior angle slightly 

 produced and acute, and inner angle rounded. Legs all ambu- 

 latory. Color in life red or pink. Length 4.8 mm. 



Description of male. — Body very slightly increases in width 

 from head to abdomen, length little over twice width as meas- 

 ured from front edge of head to end of abdomen. Head length 

 thrice its width, with frontal edge arising between eyes to form 

 small produced median point. Eyes composite, small, rounded, 

 placed in hind lateral angles of head. First antennae with basal 

 segment long and stout, second segment half length of first 

 though equally wide, and third segment one and one-half times 

 long as second and about half as wide. Flagellum formed of eight 

 segments. First antennae reach to hind edge of first thoracic seg- 

 ment. Second antennae with first or basal segment short, second 

 segment about twice length of first, third and fourth segments 

 about equal and each little longer than second, and fifth segment 

 little longer than fourth. Flagellum formed of fifteen segments. 

 Second antenna; reach little beyond hind edge of second thoracic 

 segment. Maxillipeds with palp formed of five segments. Palp 

 of mandible formed of three segments. Frontal lamina large, 

 conspicuous, and hind portion forms thick raised edge in shape 



