FISHERY BULLETIN: VOL. 77, NO, 4 



Figure 36. — Penaeopsis serrata. Stages of development of thelycum injuvenile females. A, 8mmcl;S, 9.5mmcl;C, 10.5mmcl;D, 12.5 



mm cl. All from W of Cartagena, Columbia. Scale = 1 mm. 



broad posteromedian projection markedly over- 

 lapping sternite XIV. 



In P. serrata the spermatophore does not bear 

 the mesially attached element which in impreg- 

 nated females of P. balssi, P. eduardoi, P. jerryi, 

 and P. rectacuta (i.e., all the Indo-West Pacific 



species except P. challengeri of which I have not 

 examined females carrying spermatophores) lies 

 exposed on the thelycum. Because of the absence of 

 this element, impregnated females of the former 

 species are not readily recognized. The presence of 

 a certain accessory structure in the sper- 



756 



