FISHERY BULLETIN VOL 77. NO 1 



ANTENNA (Figure IC).— Second antenna, or 

 antenna, consists of inner flagellum (endopodite) 

 and outer antennal scale (exopodite). Flagellum 

 unsegmented, slightly shorter than scale, 

 styliform, and tipped by spinulose spine. Antennal 

 scale distally divided into six joints (the two prox- 

 imal joints incomplete) and fringed with 19 heav- 

 ily plumose setae along terminal and inner mar- 

 gins; small seta occurs on outer margin at base of 

 joints and another proximally near outer margin. 

 Protopodite bears spinous seta at base of flagellum 

 but no spine at base of scale. 



MANDIBLES (Figure ID).— Without palps in 

 this and all succeeding zoeal stages. Incisor pro- 

 cess of left mandible bears four teeth in contrast to 

 triserrate incisor process of right mandible. Left 

 mandible bears movable premolar denticle 

 (lacinia mobilis) whereas right mandible bears 

 two immobile premolar denticles. Truncated 

 molar process of left mandible bears subterminal 

 tooth that occurs throughout all zoeal stages. 



MAXILLULE (Figure IE).— First maxilla, or 

 maxillule, bears coxal and basial endites and en- 

 dopodite. Coxopodite (proximal lobe) bears stout 

 seta near base, and eight spinulose spines termi- 

 nally. Basipodite (median lobe) bears nine 

 spinulose spines on terminal margin and large 

 setose seta proximally. Endopodite originates 

 from lateral margin of basipodite; bears three 

 terminal and two subterminal setae, three of them 

 sparsely plumose and remaining two spinulose. 



MAXILLA (Figure IF). — Second maxilla, or 

 maxilla, bears platelike exopodite (scaphog- 

 nathite) with 11 long, evenly spaced plumose setae 

 along outer margin and one slightly longer and 

 thicker seta at the slightly expanded proximal 

 end. Endopodite gives indication of four partly 

 fused segments and bears nine large plumose 

 setae. Coxopodite and basipodite bilobed. Coxopo- 

 dite bears 21 setae, 4 on distal lobe and 17 on 

 proximal lobe. Basipodite bears eight setae on 

 each lobe. Five setae, three on coxopodite (one on 

 distal lobe and two on proximal lobe) and two on 

 distal lobe of basipodite, bear row of little spines 

 along entire length. An additional seta on proxi- 

 mal lobe of coxopodite is especially spinulose. 



FIRST MAXILLIPED ( Figure IG i.— Most heav- 

 ily setose of natatory appendages. Protopodite 

 fully segmented; bears 7 setae on proximal seg- 



ment and 18 slightly smaller setae on distal seg- 

 ment, 9 of them spinulose. Endopodite distinctly 

 four-segmented; setation formula 4, 2, 1, 4. Exopo- 

 dite a longer slender ramus segmented at base; 

 bears two terminal and three or four lateral nata- 

 tory setae. Epipodite a single lobe. 



SECOND MAXILLIPED (Figure IH).- 

 Protopodite bisegmented; distal segment bears 10 

 sparsely plumose setae, no setae evident on prox- 

 imal segment. Endopodite distinctly five- 

 segmented, fourth segment expanded laterally; 

 setation formula 7, 3, 1, 2, 4. A seta on segments 1 

 and 5 of endopodite and three setae on protopodite 

 especially spinulose. Exopodite with 2 terminal 

 and 11 or 12 lateral natatory setae. No epipodite. 



THIRD MAXILLIPED (Figure ID.— 

 Protopodite bisegmented; distal segment bears 

 four setae. Endopodite distinctly five-segmented; 

 nearly as long as exopodite; setation formula 4, .5, 

 1, 1,2. Exopodite with 2 terminal and 14 lateral 

 natatory setae. No epipodite. 



PEREOPODS— Poorly developed, directed 

 under body somewhat anteriorly (Figure lA). 

 First three pairs biramous (second pereopod 

 shown in Figure IJ ), last two pairs uniramous and 

 slightly smaller than pairs 1-3. 



PLEOPODS.— Absent. 



TELSON (Figure IK).— Not segmented from 

 sixth abdominal somite; slightly emarginate pos- 

 teriorly; bears 1 + 1 densely plumose setae. Fourth 

 pair of setae longest, about one-half width of tel- 

 son. Minute spinules at base of each seta. Larger 

 spinules along terminal margin between bases of 

 four inner pairs and on setae themselves but 

 rarely on seventh pair. Uropods visible and en- 

 closed. No anal spine. 



STAGE II ZOEA 



Mean total length of Stage II (Figure 2 A) 7. .5 

 mm irange 6.7-8.2 mm; 25 specimens). 

 Chromatophore color and pattern essentially 

 identical to Stage I. except chromatophores larger 

 and color more pronounced, especially in mouth 

 parts. Rostrum still without teeth and not curved 

 downward as sometimes in Stage I. Carapace with 

 prominent supraorbital spine and clearly visible 

 antennal and pterygostomian spines. These three 



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