THE CRUSTACEA OE NEW JERSEY. 423 



rostral spine and antero-orbital spine, and if distended much 

 longer than protruded eye. Mandibles strong, well developed, 

 with well-developed compressed incurved palp joined to its upper 

 edge. First and second maxillae well developed, both with palp 

 also well developed. First maxilla with short flagellum, and 

 second maxilla with long flagellum curved medianly for distal 

 portion, also with branchial plume well developed as large tri- 

 angular distal expansion, its upper edge fringed with series of 

 long hairs, and reposing within branchial cavity. First maxilli- 

 ped well developed, with flagellum similar to that of second 

 maxillae. Second maxilliped large, with firm flagellum though 

 this narrow, completely closing buccal cavity. Thoracic legs 

 with anterior and posterior pairs modified, though all well de- 

 veloped. Anterior pair, or chelipeds, considerably enlarged, about 

 equal, massive, and palms with strong outer superior keel and 

 also similar inner superior keel. Dactyli of chelipeds with 

 inner edges furnished with alternating stronger or larger and 

 weaker or smaller molar-like teeth. Second, third and fourth 

 pair of thoracic legs similar, monodactylous, all much more 

 slender and smaller than chelipeds, and third pair a trifle longer 

 than others, which are more or less subequal. Fifth pair of am- 

 bulatory legs smallest, and with two distal articulations modi- 

 fied into swimming-paddles, being broad and compressed, or 

 greatly dilated, and each joint rounded in contour. Telson broad 

 and rounded somewhat, extends trifle over half way to mouth. 



Color in life pale sandy-brown. Carapace above, and upper 

 basal articulations of thoracic legs mottled or spotted with a 

 tinge of maroon-brown. Smaller examples are usually less 

 mottled or with fewer spots than older ones. Lower surface 

 of body and limbs pale or immaculate. Paddles of last legs with 

 brownish edges. Length of carapace 60 mm., width 70 mm. 



Remarks. — One of our most abundant species, occurring 

 all along sandy beaches, even along our most open beaches 

 below low-water mark, and also living off shore where 

 sandy bottoms occur. I have found it abundant at Mana- 

 squan Inlet, Point Pleasant, in Bamegat Bay at Barnegat 

 Pier and near Seaside Park, Atlantic City, in Great Egg 



