498 



BULLETIN" 15 8, UNITED STATES NATIONAL MUSEUM 



Female. — Body about twice as long as wide; head considerably 

 wider than long, narrowed anteriorly, with a rounded knob at each 

 corner, terminating posteriorly in a raised border. First segment 

 forming a short neck; second segment twice as wide as first, with 

 winglike lateral processes; third, fourth, and fifth segments more 

 or less fused, a pair of processes on the ventral surface of the third 

 segment, and another at the posterior corners of the fifth segment. 

 Genital segment as wide as long; abdomen 1-segmented, globular. 

 First antennae 1-segmented, triangular, very fleshy ; second antennae 

 uncinate. Each leg of the first two pairs consists of a fleshy lamina, 

 enlarged and indented at its tip. Total length, 6 mm. 



Male. — Unknown. 



Re-marks. — This species may be recognized by the fleshy triangular 

 antennae, and by the lateral wings on the second segment. The two 

 hosts frequent the continental shelf and slope off southern New 

 England. 



CHONDRACANTHUS MERLUCCII (Holten) 



Plate 1, a ; Figubb 298 



Lemaca merluccil Holten, Skrivt. Natur. Selsk., vol. 5, Heft 2, p. 135, pi. 3, 1802. 

 Chrondracanthus merluccii T. and A. Scott, The British parasitic Copepoda, p. 

 180, pi. 20, fig. 10, pi. 47, fig. 8, pi. 53, figs. 16-19, 1913. 



Occurrence. — Numerous specimens have been taken from the mouth 

 and gill cavity of the silver hake {Merlucems Mlmearis), at Woods 

 Hole, at Marthas Vineyard, off Block Island, and in Vineyard Sound. 



^ 



^ Q 



Figure 298. — CJwndracanthus merluccii: a. Female, dorsal; i, male, lateral; 

 c, female, first antenna ; d, female, second antenna ; e, female, second 

 maxilla 



Distribution. — British seas (T. and A. Scott) ; North Sea (Timm) ; 

 Mediterranean (Heller, Valle, Carus, Brian) ; northern Atlantic 

 (Goode) ; Woods Hole (M. J. Rathbun) ; Casco Bay, Me., and the 

 fish market at Washington, D. C. (Wilson). 



