THE CRUSTACEA OF NEW JERSEY. 87 



bb. Several vestigial pairs of feet on under surface of body near head, 



though these always very small and rudimentary. pennella 



aa. A pair of well-developed appendages on neck rather close below those 



radiating from head. lerneocekopsis 



Genus LERNE/ENICUS Le Sueur. 



Lerncccnicus Le Sueur, Journ. Acad. Nat. Sci. Phila., Ill, 1824, p. 289. Type 



Lerneocera radiata Le Sueur, second species. 

 Lernccenicus, auct. 

 Foroculum (Thompson) Bassett-Smith, Proc. Z06I. Soc. London, 1899, p. 



484. Type Lerncra spratta Sowerby, monotypic. (Nom. in syn.) 



Head rounded or obliquely pointed, with short, simple, horn- 

 like excrescences projecting backwards. Neck non-segmented, 

 long, passes gradually into genital segment, which latter in 

 same straight line. Abdomen without penniform processes. 

 Thoracic limbs placed close together just behind head, first two 

 biramose, third and fourth uniramose, and all with two joints. 



One species frequently found on the menhaden of our coast. 



Lerneaenicus radiatus (Le Sueur). 



Plate 21. 



Lerneocera radiata Le Sueur, Journ. Acad. Nat. Sci. Phila., IH, 1824, p. 288, 

 PI. II, fig. I. No locality (though eastern coast of United States doubt- 

 less intended; on Clupea tyrannus Latrobe). 



Lernea radiata De Kay, N. Y. Fauna, Crust., VL 1844, p. 60. No locality 

 (evidently New York intended; "found on the Alewife"). 



Lerneonema radiata S. L Smith, Rep. U. S. F. Com., I. 1871-72 (1873), p. 

 578 (284), PI. 7, fig. 30. Great Egg Harbor, N. J. (on Brevoortia tyran- 

 nus) . 



LerncBOnema radiata R. Rathbun, Proc. U. S. Nat. Mus., V, 1884, p. 491 

 (Smith's material). 



Lernecenicus radiatus Fowler, Proc. Acad. Nat. Sci. Phila., 1913, p. 62. 

 Chincoteague, Virginia. 



Description. — Body elongate, filamentous, for greater part an- 

 teriorly or at least two-thirds, very slender and evenly filiform. 

 Posterior portion of body dilated cylindrically. though at first 

 this rather gradual. These two regions include the thorax proper. 

 Head terminal, furnished with five slender filamentous radiating 

 appendages, all simple, similar, attenuated at their ends and 



