FISHERY BULLETIN: VOL 76, NO. 1 



somite; bears eight pairs of densely plumose setae. 

 Uropods still enclosed. Anal spine present but mi- 

 nute. 



STAGE III ZOEA 



Total length of Stage III 6.2 mm (range 6.0-6.6 

 mm; 10 specimens). Rostrum (Figure 3A) projects 

 horizontally but curves slightly downward at tip; 

 bears the beginning of a tooth at base. Epipodite of 

 first maxilliped minutely bilobed; pleurobran- 

 chiae present as minute buds. 



ANTENNULE (Figure 3B).— Inner flagellum un- 

 segmented; about one-half to two-thirds length of 

 outer flagellum. Outer flagellum unsegmented; 

 bears three long and three shorter aesthetascs 

 terminally and one group of two aesthetascs prox- 

 imally. Each segment bears additionally one or 

 two long plumose setae. Large spine projects vent- 

 rally from proximal segment. 



ANTENNA (Figure 3C).— Flagellum three-seg- 

 mented; about two-thirds length of scale and 

 tipped by remnant terminal spine. Antennal scale 

 slightly narrower than in Stage II and fringed 

 with 21 plumose setae; two complete joints at tip. 

 Spine on protopodite at base of scale somewhat 

 larger than in Stage II. 



FIRST PEREOPOD (Figure 3D).— Has begun to 

 acquire adult shape, particularly in widened prop- 

 odite and carpopodite segments. Exopodite bears 

 12 natatory setae in addition to terminal pair. 



SECOND PEREOPOD (Figure 3E).— Endopodite 

 bears a few additional setae and dactylopodite 

 slightly more conical than in Stage II. Propodite 

 not yet projected anteriorly. Exopodite of second 

 pereopod bears 9-10 natatory setae in addition to 

 terminal pair. 



THIRD PEREOPOD.— Essentially identical to 

 third pereopod of Stage II except each segment of 

 endopodite bears an additional seta or two. 



FOURTH (Figure 3F) AND FIFTH PERE- 

 OPODS. — Have begun to acquire adult shape, 

 especially in lengthened dactylopodite and 

 slightly widened propodite. 



PLEOPODS (Figure 3G).— Bilobed, unseg- 

 mented, and without setae. 



242 



TELSON (Figure 3H).— Uropods free. Endopodite 

 undeveloped; about one-third length of exopodite 

 and bearing two simple setae terminally. Anal 

 spine clearly visible. 



STAGE IV ZOEA 



Total length of Stage IV 7.7 mm (range 6.8-8.3 

 mm; 10 specimens). Rostrum (Figure 4A) bears 

 two teeth dorsally, no teeth ventrally; tip not yet 

 bifid. Epipodite of first maxilliped fully bilobed; 

 pleurobranchiae small but readily visible, project 

 anteriorly. Epipodite on second maxilliped pre- 

 sent as a small bud. No mastigobranchiae. 



ANTENNULE.— Shaped as in adult. Neither 

 inner nor outer flagellum segmented. Outer flagel- 

 lum bears an additional group of three aesthetascs 

 proximally. 



ANTENNA (Figure 4B).— Flagellum six-seg- 

 mented; longer than scale but does not extend past 

 terminal setae of scale. Antennal scale without 

 joints at tip. Other than increase in size, changes 

 in antennal scale from Stage IV onward are neg- 

 ligible. 



FIRST PEREOPOD.— Essentially no change from 

 Stage III except exopodite may have an additional 

 pair of natatory setae. 



SECOND PEREOPOD (Figure 4C).— Distal joint 

 of propodite projects slightly anteriorly. Exopodite 

 has 10-12 natatory setae in addition to terminal 

 pair. 



THIRD PEREOPOD.— Shaped as in adult; exopo- 

 dite with five pairs of natatory setae in addition to 

 terminal pair. 



FOURTH AND FIFTH PEREOPODS.— Shaped 

 as in adult. 



PLEOPODS (Figure 4D).— Still unsegmented; 

 length of second pleopod about one-third height of 

 second abdominal segment. Neither setae nor ap- 

 pendix internae present. 



TELSON (Figure 4E).— Endopodite of uropod 

 nearly as long as exopodite and fringed with about 

 20 setae. Lateral margins of telson nearly parallel 

 but slightly wider posteriorly and bear two spines 

 each. Terminal margin still slightly emarginate; 



