FISHERY BULLETIN: VOL. 79, NO. 3 



0.5 mm 



Figure 8.— Stage I zoea of Heptacarpus camtschaticus: A, whole animal, right side; B, carapace and eyes, dorsal; C, antennule, 



ventral; D, antenna, ventral; E, telson, ventral. 



Heptacarpus camtschaticus — 

 Stage I Zoeae 



Mean total length of Stage I (Figure 8A), 2.9 mm 

 (range 2.8-3.1 mm, 10 specimens). Carapace with- 

 out spines; minute rostrum curves slightly down- 

 ward following dorsal contour of sessile eyes 

 (Figure SB). 



Antennule (Figure 8C). — Unsegmented peduncle 

 with conical projection, plumose seta, simple 

 spine, and small projection. Plumose seta about 

 tvdce length of conical projection. Conical projec- 

 tion has four aesthetascs terminally, three small 

 aesthetascs subterminally. 



Antenna (Figure 8D). — Unsegmented flagellum 

 434 



about three-fourths length of scale, tipped by stout 

 spinulose spine. Scale similar to scale of Stage I 

 E. suckleyi (Figure 3C) except noticeably shorter 

 and wider. 



Mandibles, maxillule, maxilla, and maxillipeds. 

 — Mouthparts similar to those of Stage I E. 

 suckleyi, except coxopodite of maxillule has seven 

 spinulose setae; basipodite of maxilla has six setae 

 on each lobe; first maxilliped has no epipodite; 

 setation formulas of the endopodites of the second 

 and third maxillipeds are 5, 2, 1, 3 and 4, 2, 0, 

 0, 2, respectively. 



Pereopods (Figure 8 A). — All five pairs present: 

 pairs 1 and 2 biramous; 3-5 uniramous. 



