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PROCEEDINGS OF THE NATIONAL MUSEUM 



bifurcation, posterior margin produced into median point; antero- 

 lateral spines of carapace strong but not extending to base of rostral 

 plate; mandibular palp and 4 epipods present; raptorial claw slender, 

 dactylus with 6 teeth, outer margin of dactylus flattened but not 

 conspicuously sinuate; dorsal ridge of carpus undivided; fifth thoracic 

 somite irregularly carinate, with longitudinal and transverse carinae; 

 anterior portion of lateral process of fifth somite directed antero- 

 laterally, apex blunt; posterior lobe slender, apex rounded; submedian 

 carinae of last 3 thoracic somites armed posteriorly, at least 4 of carinae 

 between submedians also armed ; lateral process of sixth somite bilobed, 

 anterior lobe large, apex obliquely truncate, posterior lobe triangular, 



Figure 6. — Squilla carinata Serene, male TL 

 88.4, AmbaroBay: anterior portion of body. 



slenderer; lateral process of seventh thoracic somite bilobed, both 

 lobes triangular, anterior lobe smaller; ventral keel on eighth thoracic 

 somite low, triangular; each abdominal somite with numerous longi- 

 tudinal carinae, last somite with fewest; abdomen with submedian, 

 intermediate, and lateral carinae spined posteriorly on all 6 somites, 

 marginals of first 5 somites also armed; on first 5 somites median and 

 up to 4 other carinae between submedians also armed; on fifth somite 

 only, 1-2 carinae on each side between intermediate and lateral 

 carinae spined; remainer of abdominal carinae unarmed; telson slender, 

 longer than broad, with 4 pairs of sharp marginal teeth and 12 or 

 more carinae of varying length on either side of median carina; 



