PARASITIC COPEPOD CRUSTACEANS — LEWIS 



79 



posterior and lateral to mouth cone base, as extension of platelike 

 formation forming attachment and articulation surface for mandible. 

 Postoral process 3-segmented, first and second segments of approxi- 

 mately equal width although first somewhat longer than second and 

 second bearing minute knob on anterior and another on posterior 

 distal sm-face, anteriormost knob (at least) with spinule. Third 

 segment somewhat narrower than second or first, ovoid in dorsal 

 view, with distinct, marginally denticulated spine distally and small, 

 knoblike accessory process at base of spine. Pair of ovoid adhesion 

 pads (fig. Id) present posterior to mouth cone and postoral process, 

 just medial to maxilla base, at anterior end of heavily sclerotized 

 ridge associated with maxilliped base. Maxilla (fig. 8e) 2-segmented, 

 first segment slightly less than one and one-half times the length of 

 second, excluding terminal processes, more strongly developed. 

 Second segment slender, with 2 saber-shaped terminal processes, each 

 with numerous, stiff plumosities. 



Table 3. — Armature of thoracic 



js I-IV of the female of Pandarus satyrus Dana, 

 1849 



♦Armature elements in middle of segment. 



Maxilliped (fig. 8/) 2-segmented, first segment irregular although 

 of general triangular outline from lateral viewpoint, with adhesion 

 pad on posterodistal surface. Second segment smaller than first, 

 irregular, with knoblike projection from anterior distal surface and 

 bilobed terminal process projecting posteriorly over part of first 

 segment adhesion pad when second segment flexed. Terminal pro- 

 cess lightly rugose, inner lobe longer than outer; single, hairlike 

 accessory process present on second segment, underneath terminal 

 process. 



