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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 101 



First leg with spinulose basipod ; exopod tipped with five strong 

 spines; endopod with a long terminal seta; medial to this is a 

 strong seta. Second leg with a spinulose basipod ; exopod ends in 

 a spinulose disc ; endopod spinulose, with a single seta. Third leg 

 uniramous, flat, lamellate. Fourth leg biramous ; rami slender, 

 tapering, rounded at tips, more than four times as long as base, 

 extending one-third their length beyond dorsal plate. Fifth legs 

 uniramous, cylindrical, one-tenth as long as fourth leg, extending 

 diagonally back on each side of genital segment. 



Measurements: Length 2.5-3.3 mm. 



Male. — Like female but without a dorsal plate, smaller, and 

 with the third legs with two slender rami instead of being flat 

 plates. First antennae 5-segmented. Caudal rami with three 

 spines on lateral margins. 



Measurements : Length 1.8 mm. ; width of carapace 0.52 mm. 



Type.—V.S.'NM. No. 88548. 



Hosts. — Three females were taken from the gills of porkfish, 



Figure 70. — Lernanthropus ampl'ttergum, new species: a, Ventral view, female; b-e, 

 Lernanthropus bifidus, female: b, Dorsal plate; c, ventral view of entire female; 

 d, second antenna ; e, first leg. 



