COPEPOD CRUSTACEANS — LEWIS 



13 



Mandible (fig. 5a) 2-segmented, first segment slightly longer than sec- 

 ond, second bearing 2 short, flattened, pectinate processes distally, 

 ventralmost longest. Postantennal process (fig. 5b) well developed, con- 

 sisting of spinelike falciform projection slightly posterior to antennule 

 base and directed posteroventrally; base heavily sclerotized and en- 

 larged, tip sharply pointed. Maxillule (fig. 5a) nodular, situated un- 

 mediately posterior to mandible base, bearing 2 long, very lightly plumose 

 setae, 1 shorter naked seta and 2 minute setules. Maxilla (figs. 5a, c) 

 with one distinct segment although indication of second segment fused 

 with cephalo thorax; armature of distinct segment consisting of 2 spikelike 

 projections, one subterminal and very hghtly plumose, second terminal, 

 finely denticulated along inner margin. Paragnath (fig. 5a) lobate, 

 curved inward sharply, with slightly fuzzy distal end. 



Maxilliped (fig. 5d) 2-segmented although indication of third seg- 

 ment suggested by heavily sclerotized, platelike process intimately 

 associated with cephalothorax but forming articulation surface for max- 

 illiped. First segment elongate, with 1 or 2 naked setae arising from 

 slight depression of median posterior surface. Second segment with 

 long, indistinctly separable falciform process, distal end of segment 

 with nodular swelling bearing 1 or 2 naked, setule-like accessory 

 processes. 



For nature of legs and armature see figures 4c, d, 5e-h, and table 3. 



Table 3. — Armature of thoracic legs I-V of the female of Anchistrotos moa, new 



species 



'Designation under protopodite and exopodite for convenience; association of segment uncertain. 



Figure 4. — Anchistrotos moa, new species, female: a, dorsal view; b, lateral view; c, genital 

 segment, sixth legs, abdomen, and caudal rami, ventral view; d, fifth leg, ventral view; 

 e, rostrum, frontal region and proximal segment of antennules, dorsal view;/, right anten- 

 nule, dorsal view (setal plumosities not figured); g, antenna, ventral view; h, third segment 

 of antenna, dorsal view. 



