442 REPORT OF NEW JERSEY SiTATE MUSEUM. 



inch or more in diameter, and not so numerous as those of the 

 Uca. It can pinch, however, quite effectively with the large 

 chelipeds, unlike Uca, though it is less active in its movements. 



I have examined Say's type, of which only the imperfect 

 dried carapace remains. It is labeled from New Jersey. Be-" 

 sides this is also a dried example from Dennis Creek, obtained 

 many years ago. 



Genus PLANES Bowdich. 

 The Gulf-zvced Crabs. 



Planes^ (Leach) Bowdich, Excursion to Madeira, 1825, p. 15. Type Planes 



clypeatus Bowdich, monotypic. 

 Nautilograpsiis Milne-Edwards, Hist. .Nat. Crust., II, 1837, P- 89. Type 



Cancer minutus Linnseus, monotypic. 



Carapace subquadrate, with postero-lateral margins somewhat 

 convergent, dorsally smooth and slightly convex, and usually with 

 slightly indicated lateral postorbital tooth. Front broad, usually 

 about half width of carapace, and anterior margin slightly pro- 

 jecting and nearly straight. Orbits small, margins entire or with 

 only very small notch beneath eye-peduncles near exterior orbital 

 tooth. Epistoma short, broadly transverse. Longitudinal ridges 

 of endostome distinct and well defined. Post-abdomen in male 

 distinctly seven-jointed, its basal segments occupying whole width 

 of sternum between cox?e of ambulatory legs. Eye-peduncles 

 short and thick. Antennules transversely plicated. Basal joint 

 of antennas short and robust, produced to edge antero-external 

 of orbit, flagellum short. Exterior maxillipeds have rhomboidal 

 gape, merus joints distally truncated and their anterior margins 

 even slightly concave, and carpal joints articulated near rounded 

 antero-external angles of merus joints. Chelipeds (in adult 

 males) rather robust, subequal, of moderate size, merus trigonous, 

 with anterior margins dentated, carpi with tooth or spine on in- 

 terior margins, palms somewhat turgid and rounded above, and 



\A.lso used by Rondani 1864. and Saussure 1883, in Insects. 



