LKPEOPHTHEIEUS NORDMANNI. 67 



Male. — The male, which is only about half the size 

 of the female, has the carapace proportionally rather 

 longer, and the frontal plates are more distinct. The 

 free thoracic segment is also rather longer and the 

 genital segment narrower than in the female, and the 

 postero-lateral corners of the genital segment have each 

 two small angular processes, the one slightly anterior 

 to the other. Abdomen short and about one third the 

 length of the genital segment, and composed of two un- 

 equal joints — the proximal one being small. Caudal 

 rami short and bearing several short setse. 



Habitat. — Parasitic on the short sun-fish (Orthagoris- 

 cus mulct). Coast of County Antrim, Ireland, 1848 

 (IT. Thompson). Polperro, Cornwall (A. M. Norman). 

 Plymouth (Bassett- Smith). Aberdeen (T. Scott). 

 Found also on a short sun-fish captured off Berry 

 Head (E. V. Elwes). 



L. nonhnanni does not appear to be very commonly met with ; 

 the sunfish when captured is usually subjected to some rough 

 handling ere it reaches the market and the parasites get 

 rubbed off. 



C. B. Wilson records this species from both the Atlantic 

 and Pacific Coasts of North America. 



3. Lepeophtheirus hippoglossi (Kroyer). 



(Plate VI, figs. 4, 5; Plate XVII, fig. 2 ; Plate 



xvm, figs. 8-io.) 



1838. Caligus hippoglossi Kroyer. (70) R. l,vol. i, p. 625, pi. vi. fig. 3. 



1850. Lepeophtheirus hippoglossi Baird. (4) p. 276, pi. xxxii, fig. 

 12 ( ? ). 



1850. Lepeophtheirus obscurus Baird. (4) p. 277, pi. xxxii, fig. 11 ($). 



L863. Leprojililheirus hippoglossi Kroyer. (71) p. 131, pi. vi, fig. 5 a-d. 



1900. Lepeophtheirus hippoglossi T. Scott. (112) p. 151, pi. v, figs. 

 38-42; pi. vi, figs. 1.2. 



1905. Lepeophtheirus hippoglossi C. B. Wilson. (145) p. 625, pi. xx, 

 figs. 234-243. 



Female. — Carapace somewhat longer than broad and 

 equal to rather more than half the entire length of the 

 animal, lateral margins gently and evenly arcuate. 

 Frontal plates narrow, without lunulas. Free thoracic 

 segment small. Genital segment fully half the length 



