NO. 3574 COPEPOD CRUSTACEANS — ^LEWIS 67 



(USFWS) . Two females and 1 male (USNM 1 12883) from A. solandri 

 (Cuvier) captm-ed near Washington Island (Line Islands) (USFWS. 

 Two females and 1 male (retained by author) from external surface 

 of A. solandri (Cuvier) captured near Fanning Island (Line Islands) 

 (USFWS). 



Measurements. — (In mm) 6 females and 4 males: 



female male 



Length of cephalothorax, including 



frontal region 

 Width of cephalothorax 

 Length of genital segment, including 



posterior projections but not fifth 



legs 

 Width of genital segment 

 Length of abdomen 

 Length of alae 

 Length of fifth leg, measured along 



outer margin 

 Length of caudal rami 

 Length of egg strings (4 strings) 



Description. — Female cephalothorax (fig. 25a) ovoid, consisting 

 of cephalon and first 4 thoracic segments. Frontal region distinct, 

 with pair of narrow membranes along median anterior edge. Lat- 

 eral cephalothoracic margins flatly convex, with narrow membrane 

 and row of fine, hairlike plumosities, membrane extending around 

 posterior lateral cephalothoracic regions to beginning of posterior 

 sinus. Posterior sinus ovoid, lateral surface heavily sclerotized, bear- 

 ing smaU, posteriorly projecting membrane from posterior haK and 

 fine membrane along aU of margin, membrane projecting across 

 most of sinus. Anterior end of sinus sharply rounded, with smaU, 

 lappet-like, posterodorsaUy projecting membrane; inner surface irreg- 

 ular. Median cephalothoracic region slightly irregular, extending 

 almost to end of lateral cephalothoracic regions. Dorsal surface of 

 posterior lateral cephalothoracic region with row of fine, hairlike 

 plumosities along posterior lateral surface. Dorsal cephalothoracic 

 grooves distinct, forming irregular H although cross groove V-shaped, 

 with apex directed anteriorly; anterior longitudinal grooves of H 

 turning inward sharply just anterior to ocular region. Ocular region 

 small, consisting of 2 darkly pigmented cup-shaped regions contiguous 

 on median longitudinal axis of body, each with spherical lens. 



