286 REPORT OF XE\\' JERSEY STATE MUSEUM. 



Genus NEROCILA Leach. 



Nerocila Leach, Diet. Sci. Nat., XII, 1818, p. 35. Type Xerocila blautvillii 



Leach, monotypic. 

 Idithyopliiliis Latreille, Regne Animal Cuv., Ed. 2, IV. 1829, p. 133. Type 



Nerocila blainvillii Leach, virtually, as this name proposed to replace 



Nerocila. 

 Emphylia Koelbel, Sitz. Ak. Wiss. Wien, LXXVIII, i8;8, p. 413. Type 



Einphylia ctcnophora Koelbel, monotypic. 



Body relaxed, usually flattened. Head produced behind in 

 three lobes, not immersed. First pair of antennae almost con- 

 tiguous at base. First seginent of thorax with front edge deeply 

 trilobed. Hind angles of segments from second to last increase 

 gradually in length, first often but little produced, and posterior 

 most always produced, often abruptly longer than first ones. 

 Anterior epimera almost always extend to or beyond hind angle 

 of segment. Posterior epimera produced, acute, not reaching 

 hind angle of segment. Abdomen free, rarely covered at base 

 or sides. Legs rather long. 



Species rather numerous, and parasitic on various fishes. One 

 occurs on our coast. 



Nerocila munda Harger. 

 Plate 87. 



Nerocila munda Harger. Rep. L'. S. F. Com., I, 1871-72 (1873). p. 571. I'iiic- 

 yard Sound. 



■ Harger, 1. c, VI, 1879 (1880.), p. 392, PI. 10, figure 65 (types). 



? Cymothoa pallida Rafinesque, Amer. Month. Mag. Crit. Rev., II, Nov. 1817, 

 p. 42. Near Neiv York (in gills of fishes, shads, herrings, perches, min- 

 nows, etc.). 



« 



Description. — Body oblong, ovate, length a little over twice 

 width. Head large, partly quadrate, or about wide as long, hind 

 edge with three lobes, of which median largest. Front edge of 

 head somewhat triangulate, and apex obtusely rounded. Eyes 

 small, round, compound, placed in hind lateral angles of head. 

 First pair of antennae composed of eight joints, reach to middle 

 of first thoracic segment. Second pair of antennae formed of 



