COPEPOD GENUS DENTIGRYPS — LEWIS 363 



John Shoup, and Charles King at Eniwetok Atoll. One adult male 

 designated as the allotype (USNM 107868) taken by the author 

 from the external surface of a specimen of Epineyhelus fuscoguttatus 

 (ForskSl) captured by hook and line at Eniwetok Atoll. Two 

 ovigerous and one nonovigerous adult females in addition to one adult 

 male designated as paratypes (USNM 107869) taken by the author 

 from the external sm'face of the allotype host. Two ovigerous adult 

 females and one nonovigerous adult female designated as paratypes 

 (USNM 107870) taken by the author from the external surface of a 

 specimen of Aulostomus chinensis (Linnaeus) captured by hook and 

 line at Eniwetok Atoll. Three ovigerous females and one adult 

 male designated as paratypes (retained by the author) taken from 

 the external surface of a specimen of Balistoides viridescens (Bloch) 

 captured by hook and line at Eniwetok Atoll. 



Measurements. — Holotype: Greatest length, excluding caudal 

 setae and fifth legs, 3.56 mm. Greatest length of cephalothorax, 

 including frontal region, 2.80 mm.; greatest width excluding marginal 

 flanges, 2.64 mm. Greatest length of genital segment, excluding 

 fifth legs, 0.58 mm.; greatest width 1.10 mm. Greatest length of 

 abdomen 0.35 mm. Greatest length of fifth leg 0.68 mm. Greatest 

 length of fifth-leg terminal process 0.22 mm. 



Allotype: Greatest length, excluding caudal setae and fifth legs, 2.78 

 mm. Greatest length of cephalothorax, including frontal region, 

 2.33 mm.; greatest width excluding marginal flanges, 2.18mm. Great- 

 est length of genital segment, excluding fifth and sLxth legs, 0.30 mm.; 

 greatest width 0.53 mm. Greatest length of abdomen 0.11 mm. 

 Greatest length of fifth leg 0.32 mm. Greatest length of fifth-leg 

 terminal process 0.14 mm. Greatest length of sixth leg 0.18 mm. 

 Greatest length of sixth-leg terminal process 0.11 mm. 



For measurements of all specimens, see tables 7 and 8. 



Description. — Adult: Female approximately 3.4-4.0 mm. in 

 length, male approximately 2.4-2.8 mm., excluding setae. Anterior 

 lateral cephalothoracic margin forming sharply-angled, posteriorly- 

 directed protrusion. Free fourth pedigerous segment of female and 

 male ahnost, if not completely, covered dorsally by median cephalo- 

 thoracic region. Division between fourth pedigerous and genital 

 segments indistinct in female, distinct in male. Genital segment of 

 female almost twice as wide as long, without posterior dorsal pro- 

 jections but with two small, irregular ventral projections, in region of 

 oviducal opening. Male genital segment irregularly bell-shaped. 

 Female- and male fifth legs appearing 2-parted, consisting of well- 

 developed, heavily sclerotized proximal portion with scoop-shaped 

 distal end bearing plumose, strongly developed, spike-shaped terminal 

 seta. Proximal part of female fifth leg extending posteriorly past 



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