THE CRUSTACEA OF NEW JERSEY. 183 



Bellia (nee Milne-Edwards 1848) Bate, Ann. Mag. N. Hist., VII, 1851, p. 



318. Type Oniscits arenarius Slabber, monotypic. 

 Sulcator Bate, 1. c, XIII, 1854, p. 504. Type Oniscus arenarius Slabber, 



monotypic. 



Body short, robust, with rather large coxal plates, three 

 anterior pairs of which curved and obtusely pointed at tip. 

 Cephalon depressed and produced in front to short rostral projec- 

 tion. Metasome poorly developed, with small epimeral plates. 

 Urosome generally folded beneath metasome. Superior an- 

 tennae with joints of peduncle sharply defined and densely setous, 

 accessory appendage well developed. Inferior antenn?e longer 

 than superior, penultimate joint of peduncle laminarly expanded 

 and fringed posteriorly with long ciliated setae. Mandibles of 

 usual structure, with rather large palp. First maxillae with 

 densely ciliated flap-shaped expansion outside basal part, 

 masticatory lobe transversely truncated at tip, basal lobe 

 not very large, palp well developed with curved terminal 

 joint and furnished with tufts of slender bristles. Second 

 maxillae largely developed, outer lobe forming thin semi- 

 lunar lamella finely ciliated on outer edge and fringed along 

 inner edge with dense series of very delicate setae, inner lobe 

 much shorter than outer, and outside with sigmoid setous ridge. 

 Maxillipeds of moderate size, basal and masticatory lobes nearly 

 equal in size, setous on inner edge. Palp rather large, with 

 second joint produced at end interiorly to rounded lobe, and on 

 inner side with several transverse rows of very delicate bristles. 

 Third joint of maxillipeds securiform, bent at right angle in 

 middle, and dactylus wanting. Gnathopoda comparatively feeble, 

 propodus of anterior ones simple and without any distinctly de- 

 fined palmar edge, that of posterior ones forming minute chela 

 at tip. Two anterior pairs of peraeopoda comparatively robust, 

 carpal joint posteriorly with rounded lamellar expansion, pro- 

 podal joint constricted at base and outer part rounded obtusely. 

 Three posterior pairs of peraeopoda very largely developed, 

 with basal, meral and carpal joints expanded to scale-like pieces, 

 flanking sides of animal. Dactyls wanting to all peraeopoda. 

 Pleopoda poorly developed. Uropoda of rather dissimilar 

 structure, first pair comparatively strong, with both rami 



