FISHERY BULLETIN: VOL. 74, NO. 2 



mm (range 5.6-6.5 mm; 50 specimens). Chro- 

 matophore color and pattern essentially identical 

 to Stage I except ventral surface of abdomen now 

 greenish. Rostrum still without teeth; not curved 

 downward as strongly as in Stage I. Carapace 

 same as Stage I except now has prominent supra- 

 orbital spine; antennal and pterygostomian spines 

 clearly visible. Eyes, sessile in Stage I, now 

 stalked. 



ANTENNULE (FIGURE 2B).— Antennule 

 shows considerable change from Stage I, now 

 three segmented. It bears on terminal margin a 

 large outer and a smaller inner flagellum, outer 

 flagellum bears four groups of three aesthetascs 

 each, one group terminally and three groups 

 along inner margin; inner flagellum bisegmented 

 and bears three setae terminally, one long and 

 two short; originating at base of these two fla- 

 gella is a dorsal budlike projection bearing four 

 simple setae (projection and setae not shown in 

 Figure 2B). Proximal segment of antennule 

 laterally expanded at base, with about 12 small 

 setae arranged laterally near expansion; 3 

 lateral plumose setae and about 14 dorsally pro- 

 jecting but smaller plumose setae ring terminal 

 margin; large spine projects downward from ven- 

 tral surface. Second segment has 4 lateral plu- 

 mose setae, 2 long and 2 short, and about 10 dor- 

 sal plumose setae ringing terminal margin. 

 Third segment has seven lateral plumose setae — 

 five originating ventrally and the remaining two 

 dorsally — and three simple setae — two dorsal 

 and one lateral. 



ANTENNA (FIGURE 2C).— Inner flagellum 

 nine segmented, about twice as long as scale; 

 distal segment tipped by about six small setae. 

 Spine on basipodite at base of inner flagellum re- 

 duced in size. Antennal scale fringed with 28-30 

 long, thin plumose setae along terminal and 

 inner margins. Joints at distal tip reduced to 

 four, three of them incomplete. Distal outer seta 

 of scale a stout spine. 



MANDIBLES (FIGURE 2D).— More massive 

 than in Stage I but still without palps. Both 

 mandibles bear pair of premolar serrated denti- 

 cles, and molar processes are more developed. 

 Truncated end of molar process of right mandible 

 formed into curved lip. Subterminal processes 

 still present on left; mandible. 



330 



MAXILLULE (FIGURE 2E).— Endopodite es- 

 sentially unchanged from previous stage. Basi- 

 podite bears 10 spinose spines in two rows and 

 flve spinous setae on terminal margin, but no fine 

 hairs. Coxopodite bears 12 setae terminally, 

 5 spinous and considerably longer than remain- 

 ing 7. 



MAXILLA (FIGURE 2F).— Similar to Stage I 

 except exopodite larger and now bearing 21 or 22 

 marginal plumose setae in addition to plumose 

 seta at proximal end. Lobes of basipodite bear 

 nine setae each instead of eight as in Stage I. 



FIRST, SECOND, AND THIRD (FIGURE 2G) 

 MAXILLIPEDS.— Maxillipeds essentially iden- 

 tical to each other and nearly identical to first 

 stage except for an increase in size and a slight 

 variation in numbers of setae. 



FIRST PEREOPOD (FIGURE 2H).— First pere- 

 opod functionally developed and similar in form 

 to third maxilliped. Exopodites fringed wdth 15-17 

 plumose setae. Endopodite six segmented. Propo- 

 dite projected slightly distally. Setae more num- 

 erous than in Stage I, especially on last two seg- 

 ments. This pereopod and the remaining four 

 have a pleurobranchia bud at their base. 



SECOND PEREOPOD (FIGURE 21).— Similar 

 to first pereopod except propodite projection 

 longer and ischiopodite not segmented. 



THIRD, FOURTH, AND FIFTH PEREOPODS 

 (FIGURE 2J, K).— Third, fourth, and fifth 

 pereopods essentially identical except for slight 

 differences in size, fifth being smallest. Seven 

 functional segments including dactyl opodite. Dac- 

 tylopodite bears spine at tip and three spines lat- 

 erally. No exopodite. 



PLEOPODS (FIGURE 2A).— Pleopods evident 

 only as slightly swollen areas on abdominal 

 segments. 



TELSON (FIGURE 2L).— Telson distinct from 

 sixth abdominal segment; bears 16 densely plu- 

 mose setae along margin. Spinule arrangement 

 essentially same as Stage I. Dorsal surface bears 

 four small simple setae. Uropods still enclosed 

 but longer than in first stage. No anal spine. 



