268 REPORT OF NEW JERSEY STATE MUSEUM. 



Description. — Body ovate, length nearly twice its width. 

 Head broad, width nearly twice its length, with frontal border 

 arising between eyes and produced in small median point. Eyes 

 composite, small, rounded, placed in hind lateral head angles. 

 First antennae with long first segment, second segment half 

 length of first, and third segment twice length of second. 

 Flagellum formed of twelve segments. First antennae reach to 

 middle of first thoracic segment. Second antenn?e with first 

 segment inconspicuous, second segment short, third segment 

 twice length of second, and fourth and fifth subequal segments 

 each little longer than third. Flagellum formed of fifteen seg- 

 ments. Second antennae reach to hind edge of second thoracic 

 segment. Maxillipeds with palp of five segments. Mandibles 

 with palp of three segments. Frontal lamina large, conspicuous, 

 with front edge broadly triangulate, and hind lateral edges pro- 

 duced. Thoracic segments of about equal length. Epimera 

 not distinct from segments and point of coalescence indicated 

 b}' light longitudinal area on either side of segment. Post- 

 lateral angles of lateral parts of all segments forced into nar- 

 row and somewhat acute process, more pronounced in first four 

 segments. Abdomen formed of two segments. First segment 

 with three suture lines indicating several partly coalesced seg- 

 ments. Terminal segment long, widely rounded behind, and 

 convex anteriorly. Uropoda with fixed inner branch extend- 

 ing sli§"htly beyond end of last abdominal segment, and its 

 edges smooth. Outer movable branch of uropoda long and 

 wide as inner branch, with three or four teeth on its outer edge. 

 Legs all ambulatory. Color variable, sometimes uniform slaty- 

 gray, or often marked on dorsal surface with pale creamy or 

 rosy blotch, edged more or less with dark or black. This blotch 

 usually arranged in longitudinal symmetrical direction and 

 broad or greatly constricted medianly. Length lo mm. 



Remarks. — This southern form was originally discovered on 

 the coast of Georgia, and its range is now known to extend 

 from southern Florida to Massachusetts. It lives among eel- 

 grass or alg?e, or rocks, often where the latter are dark and 

 covered with barnacles. Sav found it very numerous on the 



