FISHERY BULLETIN: VOL. 87, NO. 3, 1989 



Figure 13. — Metape7iaeopsis palmensis mysis III. (a) whole animal (lateral view), (b) 1st antenna, (e) 2nd antenna, (d) 

 mandibles, (e) 1st maxilla, (f) 2nd maxilla, (g) 1st maxilliped, (h) 2nd maxilliped, (i) 3rd maxilliped, (j) 1st pereopod, (k) 

 telson. Scale = 0.1 mm. 



POSTLARVA. The postlarva of M. palmensis 

 (Table 2, Fig. 14) lacks the supraorbital spines 

 and carapace serrations of the mysis substages. 

 Pterygostomial spine and hepatic spine remain, 

 now also a small antennal spine (Fig. 14a). Ros- 

 trum slightly shorter than eye, with 3 or 4 dorsal 

 teeth and an epigastric tooth (Fig. 14a). First 

 antenna lacking distal spine which A. formosus 

 bears on proximal segment. Two small sternal 

 spines on 1st thoracic segment, 2 long spines on 

 2nd thoracic segment (thoracic sternal spine for- 



mula 2-1-2+0 + + 0) (Fig. 15d). Abdominal spina- 

 tion reduced, only 1 dorsal spine on 6th segment. 

 Posterior margin of telson more V-shaped, spine 

 formula remaining 7 + 1 + 7 (Fig. 14k). Median 

 spine now large. Telson also bearing 3 or 4 small 

 setae on each side of its posterior margin. 



Generic Characteristics of Penaeid 

 Larvae 



The distribution of setae on the protopod and 



722 



