COPEPOD GENUS DENTIGRYPS — LEWIS 351 



distinct knoblike protrusion from inner surface of first segment that 

 appears to receive distal end of clawlike terminal process of second 

 segment when segment flexed. Sternal fm-ca present, situated 

 between and slightly posterior to maxilliped bases. 



First thoracic leg biramous although endopodite reduced to minute, 

 knoblike rudiment in adult. Protopodite 1-segmented, exopodite 

 2-segmented, second segment tipped by three spines and one seta 

 (see table 2 for remaining basic armature), inner two spines frequently 

 with small, wealdy sclerotized, acuminate projection from inner 

 surface. Second thoracic leg distinctly biramous, protopodite 2-seg- 

 mented, exopodite and endopodite both 3-segmented. Thhd 

 thoracic leg bhamous, protopodite broad, laminate, 1-segmented, 

 exopodite either 2- or 3-segmented, endopodite 2-segmented. Fourth 

 thoracic leg uniramous, protopodite 1-segmented, exopodite (pre- 

 sumably) 3-segmented, denticulations present either on outer surface 

 of second and third exopodite segments, on one or more terminal 

 spines of third exopodite segment or on both segments and spines. 



Dentigryps ulna, new species ^ 



Figures 2; 3; 4; \2a,e,i; 13a 

 (Ulua is the Hawaiian name for many of the carangid fishes.) 

 Material. — One adult, nonovigerous female designated as the 

 holotype (USNM 107864) taken by the author from the external 

 surface of specimen of Caranx melampygus? Cuvier and Valenciennes, 

 captured in trap between Diamond Head and Koko Head, Oahu, 

 Hawaii, by Samuel Kaolulo. One adult male designated as the 

 allotype (USNM 107865) taken from holotype host. Two ovigerous, 

 two nonovigerous adult females, and 1 adult male designated as 

 paratypes (USNM 107866) taken from holotype host. Four ovigerous 

 females, six nonovigerous adult females, and ten adult males designated 

 as paratypes (retained by author) taken from external surface of 

 several specimens of Caranx melampygus? captured in traps between 

 Diamond Head and Koko Head, Oahu, Hawaii, by Samuel Kaolulo. 

 Measurements. — Holotype: Greatest length, excluding caudal 

 setae and fifth legs, 6.90 mm. Greatest length of cephalothorax, 

 including frontal region, 4.50 mm.; greatest width, excluding marginal 

 flanges, 3.60 mm. Greatest length of genital segment, excluding 

 fifth legs, 1.65 mm.; greatest width 1.80 mm. Greatest length of 

 abdomen 0.68 mm. Greatest length of fifth legs 1.37 mm. Greatest 

 length of fifth-leg terminal process 0.07 mm. 



2 For a comparison of this species with Lepeophtheims spinifer Kirtlsinghe, see Discussion (p. 368). 



