hairs along medial margin. Unsegmented endo- 

 podite with nine setae (four setae slightly spinu- 

 loses Coxopodite and basipodite bilobed. Coxopo- 

 dite with eight setae on each lobe. Basipodite 

 with 16 setae: 4 on distal lobe, 12 on proximal lobe. 



FIRST MAXILLIPED (Fig. 1G). — Most setose of 

 natatory appendages. Bilobed protopodite with 5 

 setae on proximal lobe, 20 setae on distal lobe 

 (three of setae on distal lobe spinulose). Endopo- 

 dite four-segmented; setation formula 4, 2, 1, 2. 

 Exopodite (a long, slender ramus jointed at base) 

 has four natatory setae. 



SECOND MAXILLIPED (Fig. 1H).— Protopodite 

 bisegmented: Distal segment with seven setae, 

 proximal segment without setae. Endopodite 

 four-segmented; setation formula 6, 2, 1, 3. Exo- 

 podite with five natatory setae. 



THIRD MAXILLIPED (Fig. II).— Unsegmented 

 protopodite with three setae. Five-segmented en- 

 dopodite about two-thirds length of exopodite; 

 setation formula 5, 2, 1, 1, 2. Exopodite with five 

 natatory setae. 



PEREOPODS.— Poorly developed, anteriorly di- 

 rected under body. 



PLEOPODS. —Absent. 



ABDOMEN AND TELSON (Fig. 1A, J).— Abdo- 

 men with pair of posterolateral spines on somites 

 4 and 5, pair on somite 4 somewhat shorter than 

 pair on somite 5. Telson emarginate posteriorly, 

 fused with abdominal somite 6. Telson with 7 + 7 

 densely plumose setae, minute spinules at base of 

 each seta except outermost pair, larger spinules 

 along terminal margin of telson between bases of 

 four inner pairs of setae. Uropods visible and 

 enclosed. 



Stage II Zoea 



Mean total length of Stage II zoea, 3.7 mm 

 (range 3.5-4.0 mm; three specimens). Eyes 

 stalked. Carapace identical to Stage I carapace. 



ANTENNULE (Fig. 2A).— Two-segmented, with 

 large outer flagellum and smaller inner flagel- 

 lum on terminal margin. Flagella not segmented; 

 inner flagellum conical, with long spine termi- 

 nally; outer flagellum with four aesthetascs ter- 

 minally. Proximal segment with large spine pro- 

 jecting slightly downward from ventral surface. 

 Both proximal and distal segments have two 

 plumose setae each. 



L 



0.25 mm 



FIGURE 2. — Stage II zoea of Spirontocaris murdochi: A, antennule, ventral; B, antenna, ventral; C, telson, ventral. 



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