laSHEKY BULiLdSTlIN: VUL. 84, JNU. Z 



Copepodid HI 



Figures 3f-k, 4a-d 



Size-Length 0.85 mm (0.72-0.95 mm) and 

 greatest width 0.24 mm (0.21-0.26 mm), based on 37 

 specimens. 



Body form (Fig. 3f).— Spinules on ventral surface 

 of segment of leg 5 (Fig. 3g) continuous across seg- 

 ment. Seven body segments including and posterior 

 to segment bearing leg 1. (One specimen, 0.62 x 0.24 

 mm, with segments behind leg 4 telescoped as in 

 Figure 3h.) 



First antenna (Fig. 3i).— Five-segmented, 145 ^m 

 long. Armature: 3, 10, 3 + 1 aesthete, 2 + 1 aesthete, 

 and 7 + 1 aesthete 



Second antenna (Fig. 3j).— Similar to Copepodid 

 II but outermost seta on fourth segment longer and 

 recurved. 



Maxilliped.— As in Copepodid II. 



Leg 1 (Fig. 3k).— Both rami 2-segmented. Arma- 

 ture: coxa 0-0, basis 1-1; exopod 1-0; III, 5; endopod 

 0-1; 1,6. 



Leg 2 (Fig. 4a).— Both rami 2-segmented. Arma- 

 ture: coxa 0-0; basis 1-0; exopod 1-0; 111,6; endopod 

 0-1; 111,4. 



Leg 3 (Fig. 4b).— Both rami 2-segmented. Arma- 

 ture: coxa 0-0, basis 1-0; exopod 0-1; 11,5; endopod 

 0-1; 111,3. 



Leg 4 (Fig. 4c).— Both rami 1-segmented. Arma- 

 ture: coxa 0-0; basis 1-0; exopod 11,4; endopod 

 111,3. (Distal outer seta on exopod somewhat spini- 

 form.) 



Leg 5 (Fig. 4d).— Represented by 2 setae, 42 and 

 29 urn. 



Leg 6.— Absent. 



Copepodid IV, female 



Figures 4e-k, 5a-c 



Size— Length 1.19 mm (0.93-1.33 mm) and greatest 

 width 0.32 mm (0.28-0.35 mm), based on 42 speci- 

 mens. 



Body form (Fig. 4e).— Eight body segments in- 

 cluding and posterior to segment bearing leg 1. 

 Spinules on ventral surface of segment bearing leg 

 5 and on anal segment (Fig. 4f) as in Copepodid 

 III. 



First antenna (Fig. 4g).— Five-segmented, 179 ^m 

 long, but slight notch on posterior edge of second 

 segment suggesting division of segment. Armature: 

 4, 15, 4 + 1 aesthete, 2 + 1 aesthete, and 7 + 1 

 aesthete 



Maxilliped (Fig. 4h).— Two-segmented, weakly 

 sclerotized, distal segment lobelike Relative position 

 of maxillipeds as in Figure 4i. 



Leg 1— Both rami 2-segmented. Armature (as in 

 Copepodid III): coxa 0-0; basis 1-0; exopod 1-0; 111,5; 

 endopod 0-1; 1,6. 



Leg 2 (Fig. 4j).— Both rami 2-segmented. Arma- 

 ture: coxa 0-0; basis 1-0; exopod 1-0; 111,6; endopod 

 0-1; 11,6. Distalmost outer seta on endopod somewhat 

 spiniform. 



Leg 3 (Fig. 4k).— Both rami 2-segmented. Arma- 

 ture: coxa 0-0; basis 1-0; exopod 1-0; 111,6; endopod 

 0-1; 11,5. Distalmost outer seta on endopod somewhat 

 spiniform. 



Leg 4 (Fig. 5a).— Both rami 2-segmented. Arma- 

 ture: coxa 0-0; basis 1-0; exopod 1-0; 111,5; endopod 

 0-1; 111,3. 



Leg 5 (Fig. 5b).— Two-segmented, but first seg- 

 ment, armed with 1 seta, not clearly set off from 

 body; second segment oval, 60 x 30 ^m, bearing 3 

 spines and 1 seta, with few small spinules near in- 

 sertion of proximalmost and distalmost spines. 



Leg 6 (Fig. 5c).— Represented by 1 seta 32 /im long, 

 with minute spinules near insertion. 



Copepodid IV, male 



Figure 5d-g 



Size— Length 1.07 mm (0.90-1.19 mm) and greatest 

 width 0.28 mm (0.25-0.31 mm), based on 38 speci- 

 mens. 



Body form— As in female, with same number of 

 body segments and similar arrangement of ventral 

 spinules (Fig. 5d). 



232 



