350 REPORT OF NEW JERSEY STATE MUSEUM. 



surface slig'htly concave above, edges elevated and not much 

 swollen, swelling- gradually disappears toward tip, converging, 

 straight or slightly convex, contracted to form short triangular 

 acumen. Basal angles of acumen indistinct, rounded, without 

 any trace of marginal spines, and point of acumen short. Post- 

 orbital ridges short, end bluntly in front, slightly diverge behind 

 end in low indistinct swelling. Carapace surface punctate, 

 slightly granulate on hepatic region, w^ith few granules on 

 branchial region immediately behind cervical groove. No lateral 

 spine. External orbital angle present, distinct, angular or 

 rounded, without spine or tubercle. Branchiostegal spine small, 

 often obsolete tubercle. Abdomen about long as carapace, nar- 

 rower in male, equal or wider in female. Front section of telson 

 with one to three, usually two, spines on hind lateral corners. 

 Hind section semi-elliptical, slightly broader than long, about 

 long as front section. 



Epistome rather long, narrow, flat, front section partly circu- 

 lar or elliptical, or truncate and subcjuadrate, median joint 

 present or absent, and about long as broad. Antennules with 

 small tubercle on lower edge of basal joint. Antennal peduncle 

 without spines or tubercles on proximal joints. Antennal 

 scale small, short, slightly longer than rostrum, reaches base 

 of fifth joint of antennal peduncle. Antennal scale with spine 

 of outer edge strong, laminar part not much broader than spine 

 and inner edge parallel to outer edge of spine for considerable 

 space. Flagellum short, often long as or less, than carapace 

 length, not reaching beyond second segment of abdomen. 



First pera^opods stout and very robust in old examples, similar 

 in sexes, except very large in old males. Hand ovate, depressed, 

 wdde, surface punctate. Inner palm edge convex, with two irreg- 

 ular rows of tubercles and a few scattered tubercles on upper sur- 

 face near marginal rows. Outer palm edge smooth, rounded 

 proximally, slightly angular distally. Fingers at least one and 

 one-half long as palm, gape at base, straight cutting-edges with 

 number of irregular strong tubercles, one about middle of edge 

 of each finger usually largest. Outer edge of movable finger 

 with more or less distinct tubercles at proximal end. Upper 



