THE CRUS'TACEA OF NEW JERSEY. 131 



rami well defined from anal segment, and in male movably 

 articulated to it, admitting of being spread outwards, second 

 caudal seta (from within) longer than others. Anterior an- 

 t-ennse generally longer than body, much more strongly built in 

 male than in female, with first two articulations fused together 

 into a broad, somewhat flat segment. Posterior antennre with 

 outer ramus seven-articulate. Posterior maxillipeds with ter- 

 minal part larger than either of biasal joints and five-articu- 

 late, setae of outer edge in male remarkably developed and 

 densely spinous. Legs comparatively slender, inner ramus well 

 developed, though considerably shorter than outer, its second 

 joint (except in last pair) with two natatory setae inside. Last 

 pair of legs with first basal joint denticulate along inner edge, 

 but without plumose setae present in other pairs. Outer ramus 

 in male without any natatory setae and more strongly developed 

 in left side, though imperfectly prehensile. Inner ramus in both 

 legs well developed, resembling that in female. 

 Several species in most seas. 



Calanus finmarchicus (Gunner). 



Pirate 35- 



Monoculus finmarchicus Gunner, K. Danske Vidensk. Selskab. Skdifter, 



Kjobenhavn, X, 1765, p. 175, figs. 20-23. Scandanavia. (Not consulted.) 

 Calanus finmarchicus Wheeler, Bull. U. S. F. Com., XIX, 1899 (1901), p. 164. 



Vineyard Sound. 

 Sharpe, Proc. U. S. Nat. Mus., XXXVIII, 191 1, p. 406. Off Delaware 



Bay. 

 fDaphinia dorsalis Rafinesque, Amer. Moiith. Mag. Crit. Rev., II, November, 



1817, p. 42. In the sea and on the shores of Long Island, etc. 



Description of female. — Body as viewed above elongately ovoid, 

 greatest width about one-third of length, also about midway in 

 length, frontal region only slightly produced. First segment 

 long, about equal to succeeding three, and posterior ones (two) 

 much shorter. Lateral edges of last pedigerous segment a little 

 produced, with rounded end. Urosome about half length of 

 metasome, and caudal rami but slightly longer than anal segment. 

 Anterior antennae reach about opposite end of trunk, and a?sthe- 



