288 REPORT OF NEW JERSEY STATE MUSEUM. 



times wider than long. Clypeus large, wide, short, triangular. 

 Mandibles wide throughout their entire length, hind part seen in 

 position turned a little inward, distal part directed inward and 

 wide but long, also covered for most part. Cutting part of man- 

 dible large, more or less trifid, hind apex always larger than other 

 apices, large movable lacinia with many spines, molar part elon- 

 gate, triangular and with triangular processes on front edge. First 

 pair of maxillae robust, lacinia of first article inflated at apex and 

 with three plumose processes, lacinia of third article wide or very 

 wide at apex and with many robust spines. Second maxillse well 

 developed, lacinia of second article wide, free, short with many 

 setse, lacinise of third and fourth articles much longer than wide, 

 with inner edge furnished with long setje. Maxillipeds well de- 

 veloped, edges of articles of palp furnished with many setae, never 

 with hooks. Epimera well defined on all segments of thorax ex- 

 cept first. First three pairs of legs usually prehensile, last four 

 pairs ambulatory. Pleopods well developed, adapted for swim- 

 ming and breathing. Second pair of pleopods in male with stylet 

 and inside inner plate. Uropoda lateral, form with last segment 

 of abdomen into caudal fan. Incubatory pouch formed of five 

 pairs of plates issuing from bases of first five pairs of legs. 



Genera about five, of which one represented in our limits. 

 Not parasitic, but living a free existence, and in these respects 

 they dififer from the TEgidse, with which they were formerly 

 included. 



Genus CIROLANA Leach. 



Cirolaiia Leach, Diet. Sei. Nat., XII, 1818, p. 347. Type Cirolana cranchii 

 Leach, monotypic. 



Body more or less elongated, with dorsal face strongly vaulted 

 and perfectly smooth. Cephalon semi-circular, frontal edge 

 evenly arched. First segment of mesosome forms on each side 

 linguiform expansion advancing over sides of cephalon. Coxal 

 plates of succeeding segments well-defined, laminar, turned 

 downwards. Penultimate segment of metasome without project- 

 ing epimera, and large terminal segment more or less narrowed 



