JACKSON ET AL.: KEY TO GENERA OF PENAEID LARVAE 



Statocyst now normally present (Fig. 6b), anten- 

 nal flagellum about the same length as in pre- 

 vious substage (Fig. 6c). Mandible with unseg- 

 mented palp (Fig. 6d). First ma.xilla similar to 

 previous substage (Fig. 6e); epipod of 2nd max- 

 illa continues to become larger and more setose 

 (Fig. 6f). Three maxillipeds now bearing rudi- 

 mentary gills (Fig. 6g, h, i), which vary in size in 



different individuals; pereopods now have func- 

 tional chelae (Fig. 6j). Shallow telson cleft 

 remains (Fig. 6k). 



POSTLARVA. The postlarva of A. formosus 

 (Fig. 7) has a rostrum with 3 dorsal teeth and an 

 epigastric tooth. Pterygostomial spine present, 

 but no supraorbital or hepatic spine. Proximal 



(k) 



Figure 6. — Atypopenaeus formosus mysis III. (a) whole animal (lateral view), (b) 1st antenna, (c) 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. 



715 



