NO. 3574 COPEPOD CRUSTACEANS — LEWIS 81 



third segment; posteriormost swelling on second segment with small, 

 slightly projecting adhesion surface. Third segment and terminal 

 process continuous, claw shaped, inner surface irregular, appearing 

 roughened or minutely denticulated distally; single, long, needle-like 

 accessory process present on inner surface just distal to small swelhng 

 on proximal medial region of segment. 



Female and male mandible (fig. 29d) 4-parted, fourth part short, 

 curved inward smoothly, bluntly rounded distally, inner margin with 

 12 denticidations although proximal 2 denticulations indistinct in 

 some specimens. Female postantennal process (figs. 29e,f) consist- 

 ing of platelike region of heavy sclerotization bearing spikelike 

 projection and 3 nodules, each nodule with several hairlike processes; 

 spikelike projection broad proximally, tapering sharply in proximal 

 half, gradually in distal half, cm'ving medially sharply in male, 

 slightly in female, sharply rounded, or pointed, distally. Female 

 postoral process (fig. 29g) bifurcate, both tines pointed; male postoral 

 process (fig. 29h) spinelike, with small spine projecting from middle of 

 outer surface and small, heavily sclerotized swelhng on middle of 

 inner surface. Female and male maxillule (figs. 29g, h) nodular, with 

 3 setules distally. Female and male maxilla (fig. 30a) 2-segmented, 

 situated just lateral and posterior to postoral process. First segment 

 approximately three-fourths the length of second, slender, lateral 

 margins almost parallel; second segment elongate, widest medially, 

 medial region with fine membrane and, in male, small, spinelike 

 projection just distal to membrane. Distal end of second segment 

 with 2 saber-shaped, flexible processes, innermost approximately VA 

 times the length of outermost, inner bearing fine membrane on inner 

 surface, outer with denticulated, membrane-like process along outer 

 margin. Male with pair of ovoid adhesion surfaces (fig. 29/) extend- 

 ing posteriorly and medially from just posterior to postoral processes 

 to just anterior to maxiUiped bases, surfaces distinctly rugose. Female 

 also with surfaces but not rugose (fig. 29i). 



Female maxilliped (fig. 306) 2-segmented, situated posterior and 

 shghtly medial to maxilla base. First segment strongly developed, 

 proximal end lobate, extending into cephalothorax as articulation and 

 muscle attachment surface. Second segment and terminal process 

 continuous, length of segment and process shghtly greater than half 

 that of first segment, terminal process clawhke, sharply pointed; 

 single small, setalike accessory process present on inner surface at 

 irregular division between segment and terminal process. Male max- 

 ilhped (fig. 30c) similar to that of female although small, irregular 

 protrusion present on medial inner surface of first segment, protru- 

 sion receiving distal end of second segment terminal process when 



226-321— 67— !— 6 



