THE CRUSTACEA OF NEW JERSEY. 85 



Genus NAOBRANCHIA Hesse. 



Naobranchia Hesse, Ann. Sci. Nat. Paris, (4) XX, 1863, p. 122. Type Nao- 



branchia cygniformis Hesse, monotypic. 

 Cestopoda Kurz, Zeitsclirift. Wiss. ZooL, XXIX, 1877, p. 407. Type Cesto- 

 poda amplectens Kurz, first species. 



Female with elongated cylindrical cephalothorax, enlarged 

 squarish genital segments, and minute abdomen. Ovaries lateral, 

 enclosed in muscular bands united together down center by a 

 membrane. Second pair of maxillipeds short, double, muscular, 

 and functional as an organ for attachment to the host. 



At present only the females of this genus are known. 



I allow the name Naobranchia Hesse precedence over Cesto- 

 poda Kurz, on account of priority. 



Naobranchia pomolobi new species. 

 Plate 19. 



Description of female. — Cephalothorax one and one-half times 

 longer than rest of body, mostly cylindrical, and acuminate at 

 end. Genital segments large, bulky, their combined width com- 

 prising greatest body width and nearly equals in length the most 

 bulky portion of body. Second pair of maxillipeds quite short, 

 double, and forming attachment to host. Color, milk-white. 

 Length of entire animal about 8 mm. 



Male. — Unknown. 



Remarks. — I first discovered this interesting parasite attached 

 to the gills of Pomolohiis psendoharengus taken in the Delaware 

 River (at Tullytown, Pennsylvania) opposite or a little below 

 Florence, in Burlington County, on May 17th, 19 12. At the 

 same time I also found a few in the branchial cavities of 

 Pomolobus ccstivalis. On May 28th, 1912, I again visited this 

 locality and examined hundreds of individuals of both species of 

 Pomolohiis, and secured about ten more specimens. It is not a 

 common parasite, and often dozens of the herring must be ex- 

 amined before one is located. They are easily seen, however, 

 their white sac-like bodies strongly contrasting against the dark 

 and red color of the gills. Often the parasites were found 



