MORGAN and PROVENZANO, DEVELOPMENT OF SQUILLA EMPUSA LARVAE AND POSTLARVA 





FIGURE 18. Squilla empusa. A-E: 

 stage VII, first to fifth pleopods re- 

 spectively. 



by one strong seta. Distal margin of basis with 

 three setae. Endopod present as palp on distal 

 margin of basis, armed with two setae. 



Maxilla (Figure 25E) four-segmented, two prox- 

 imal segments with endites, second bilobed. 



Five pairs of maxillipeds (Figure 25F to 25J) 

 each maxilliped with one epipod. First maxilliped 

 (Figure 25F) with distal margin of propodus bear- 

 ing 14 teeth, inner margin with 48 to 50 strong 

 setae arranged in 10 transverse rows, 2 or .3 most 

 distal setae spatulate with strong setules. 



Second maxilliped (Figure 25Gi with dactylus 

 bearing six teeth, pectinate propodus with three 

 moveable proximal spines, dorsal ridge of carpus 

 undivided. 



Pereiopods (Figure 26A) with setose endopod 

 and exopod. 



Last three thoracic somites with unarmed sub- 

 median and intermediate carinae. Lateral process 

 of fifth thoracic somite subacute, sloping pos- 



teriorly. Lateral processes of next two somites 

 bilobed each with a small anterior lobe and a large 

 broadly rounded posterior lobe. Median ventral 

 keel of eighth somite with rounded apex. 



Abdomen broad, depressed, Submedian, inter- 

 mediate, lateral, and marginal carinae present. 

 Abdominal spines in submedian carinae of sixth 

 somite, intermediate and lateral carinae of fifth 

 and sixth somites, and marginal carinae of fifth 

 somite, formula: submedian 6; intermediate 5 to 6; 

 lateral, 5 to 6; marginal, 5. Sixth abdominal so- 

 mite with sharp ventral spine anterior to uropod 

 articulation. 



Pleopods (Figure 26B to 26Fl with gills. Pleopod 

 setation presented in Table 2. 



Uropod (Figure 26G) with eight graded move- 

 able spines on outer margin of proximal segment 

 of exopod, last extending to middle of apical seg- 

 ment. Apical segment of exopod extending pos- 

 teriorly to apex of intermediate spine. Basal seg- 



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