THE CRUST.AJCEA OF NEW JERSEY. 219 



segment produced into small acute triangular process at lower 

 distal angle. First uropods with equal rami, about ecjual to 

 peduncle. Second uropods with rami longer than peduncle, 

 and inner ramus longer. Third uropods with ramus slightly 

 longer than peduncle. Color whitish. Length 15 mm. 



RcDiarks. — Distributed from Maine to Xew Jersey and found 

 along sandy beaches. I have examined numerous examples 

 from the banks of the Manasquan River, Point Pleasant, Holly 

 Beach, Seaside Park and Highland Beach. It is much less 

 common than Talifnts longiconiis, and may be distinguished 

 by its very large eyes and the shape of the second gnathopods in 

 the male. I have also met with it at Chincoteague Island, Vir- 

 ginia. ]\Ir. T. D. Keim has collected it at Sheepshead Bay and 

 Long Beach, on Long Island. 



^& A^^CIVIJ, VJH -WWXlf, 



Sub-Order ISOPODA. 



The I so pods. 



Body flattened dorso-ventrally and composed of three divi- 

 sions, i. c, a head, a thorax formed of seven segments, and an 

 abdomen of six segments. Sometimes one or two thoracic 

 segments united with head. Eyes usually present, paired, sessile 

 and compound, contiguous or distant. Head appendages two 

 pairs of antennae, pair of maxillipeds, two pairs of maxill?e and 

 pair of mandibles. Maxillipeds often provided with an epignath 

 on outside. In parasitic forms mouth-parts strongly modified, 

 some parts entirely disappeared. Appendages of thorax seven 

 pairs of legs, last pair sometimes wanting. Legs of uniform 

 structure and appearance in terrestrial forms, frequently first 

 pair in many forms, and even second, third and fourth pairs 

 differ conspicuously in structure, length and function from suc- 

 ceeding pairs. Six pairs of abdominal appendages, usually 

 five pairs of pleopods and a pair of uropods. Pleopoda some- 

 times natatory, but their function respiratory mostly. Some 

 or all of abdominal segments united. Telson rarely free. Mar- 

 supial plates developed in the female, form an incubating pouch. 



