FISHERY BULLETIN: VOL. 87, NO. 3, 1889 



Figure l.—Atypopenaeus formostis protozoea I. (a) whole animal, (b) ventral view of cephalothorax, (c) 1st antenna, (d) 

 2nd antenna, (dj) protopod, icU) endopod, (d^,) exopod, (e) mandibles, (f) 1st maxilla, (f,) epipod, (g) 2nd maxilla, (h) 1st 

 maxilliped, (i) 2nd maxilliped. Letters in square brackets show origins of dissected appendages. Scale = 0.1 mm. 



shown: Fig. Ih, i). Third maxilliped only a 

 bud (Fig. lb). 



Protozoea II (Table 1, Fig. 2a) with long 

 rostrum, extending beyond eye, and a single pair 

 of supraorbital spines. Second antennal formula 

 still 1+2+2 but first seta very small, sometimes 

 difficult to see (Fig. 2c). Mandibles (Fig. 2d) now 

 asymmetrical, one side with 5 serrate, free- 



standing teeth, other side only 1 (no attempt was 

 made in any dissection to determine whether a 

 particular mandible was originally from the left 

 or the right side). First and 2nd maxillae (Fig. 

 2e, f), 1st and 2nd maxilHpeds (Fig. 2g, h) sim- 

 ilar to previous substage. Third maxilliped 

 slightly more developed, biramous, however, 

 still very small (Fig. 2i). 



710 



