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Fishery Bulletin 99(2) 
Figure 10 
Metctpenaeopsis dalei. Third mysis stage: (A) first pereiopod; (B) second pereiopod; (C) third pereiopod; (D) fourth 
pereiopod; (E) fifth pereiopod. Scale bar = 0.2 mm. 
Body contour (Figs. 6G, 111): Adult-like; pleopod devel- 
oped; thorax completely covered by carapace; last five tho- 
racic sternal plates with 2, 2, 0, 1, 1 spines. 
Carapace (Fig. 6, G and H): Long rostrum with one epi- 
gastric tooth and three dorsal teeth; one pair of supraor- 
bital, antennal, pterygostomial and hepatic spines antero- 
ventral and posteroventral spines absent. 
Antennule (Fig. 1 1 A): Peduncle three-segmented, 1st 
segment with one large ventral spine, one small proximal 
spine, 40 plumose setae and a statocyst, 2nd segment with 
10 plumose setae, 3rd segment with seven plumose setae; 
outer ramus two-segmented with 2, 6 aesthetascs; inner 
ramus two-segmented with 1. 3 plumose setae. 
Antenna (Fig. 11B): Protopod unsegmented with two 
spines and one seta; endopod 23-segmented, 1st segment 
with two spines; scaphocerite with 34 marginal plumose se- 
tae, four spines on outer margin and 21 setae on surface. 
Mandible (Fig. 1 1C ): Denticulate setae absent; mandib- 
ular palp three-segmented, distal segment ovate; left man- 
dible with 1, 10, 20 plumose setae; right mandible with 2, 
11,21 plumose setae. 
Maxillule (Fig. 1 1 D ): Protopod two-lobed, coxal endite 
with nine plumose setae, basial endite with 22 naked se- 
tae; endopod four-segmented with 2, 2, 2, 3 setae. 
Maxilla (Fig. 11E): Protopod four-lobed, endites with 11, 
4, 10, 8 setae; endopod two-segmented with 8, 3 setae; 
scaphognathite with 43 plumose setae. 
First maxilliped (Fig. 1 IF ): Protopod two-lobed, coxal 
endite with nine setae and wo spinules, basial endite with 
36 setae; endopod four-segmented with 2, 0, 1, 5 setae; exo- 
pod with 10 plumose setae. 
Second maxilliped (Fig. 11G): Naked podobranch, basis 
with 16 setae; endopod five-segmented with 8, 15, 1,9, 10 
setae; exopod with six plumose setae. 
Third maxilliped (Fig. 11H): Coxa with three setae, ba- 
sis with six setae; endopod five-segmented with 13, 12, 9, 
13, 9 setae; exopod with eight plumose setae. 
First pereiopod (Fig. 12A): Coxa with four setae, basis 
with four setae; endopod 5-segmented and fully chelate 
with numerous setae; exopod with 8 plumose setae. 
Second pereiopod (Fig. 12B): Coxa with one seta, basis 
with two setae; endopod five-segmented and fully chelate 
with numerous setae; exopod with 8 plumose setae. 
Third pereiopod (Fig. 120: Coxa naked, basis with five 
setae; endopod five-segmented and fully chelate with nu- 
merous setae; exopod with 10 plumose setae. 
Fourth pereiopod (Fig. 12D): Coxa naked, basis with four 
setae; endopod five-segmented with numerous fine setae; 
exopod with 11-12 plumose setae. 
Fifth pereiopod (Fig. 12E): Similar to 4th pereiopod in 
form; exopod with 7-8 plumose setae. 
First pleopod (Fig. 12F): Uniramous; two-segmented, 
proximal segment with 3-5 setae, distal segment with 
10-14 plumose setae. 
