PEREZ FARFANTE REVISION OF PENAEID SHRIMP GENUS PENAEOPSIS 



Figure 4.—Penaeopsts balssi, 5 25 mm cl, off Kunduchi, 20 km N of Dar es Salaam. A, Petasma, dorsal view. B. Ventral view C, Right 



appendix masculina, dorsal view. Scales = 1 mm. 



ing proximally in flattened, mesially directed 

 suboval process. Ventrolateral lobule with disto- 

 lateral portion broadly rounded, its rather flexi- 

 ble marginal part broad (extending beyond level 

 of tip of ventral costa) and slightly reflexed in- 

 wardly; distal part of ventral costa curving dor- 

 somesially and ending in conspicuous, sub- 

 semicircular process (free from, though closely 

 appressed to, margin of dorsolateral lobule) 

 reaching about level of cincinnuli. 



Appendix masculina (Figure 4C) transversely 

 oval, about twice as broad as long, dorsally con- 

 vex but for lateral depression, and bearing mesial 

 patch of long setae continuing as increasingly 

 narrower band of shorter setae along distal mar- 

 gin. 



Thelycum (Figure 5) with anterior border of 

 plate of sternite XIV posterolaterally inclined, 

 plate produced into paired rather elongate, small 

 lobules flanking posteromedian projection of 

 sternite XIII, almost flat to distinctly convex ven- 

 trolaterally, and abruptly slanting dorsomesially 

 toward deep, usually broad, submedian depres- 

 sions flanking median ridge; latter broad and 

 most prominent basally, tapering and becoming 

 low anteriorly, sometimes reduced to short basal 

 protuberance; lateral portions of sternite XIV 

 densely studded with long setae, row of similar 

 ones extending along anterior border of thoracic 

 ridge, and others forming patch at base of median 



Figure 5.—Penaeopsis balssi. ? 21 mm cl, off Formosa Bay, 

 Kenya, Thelycum ventral view. Scale = 1 mm. 



ridge. Median plate of sternite XIII subtriangular 

 to orbicular, densely studded with long setae 

 radiating from naked central depression; postero- 

 median projection broad, subrectangular, with 



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