FISHERY BULLETIN: VOL, 77. NO 4 



Figure 29. — Penaeopsis serrata, i 27 mm cl, Golfo de los Mosquitos, Panama. Cephalothorax. lateral view. Scale = 5 mm. 



FIGURE 30— Penaeopsis serrata. 9 

 juvenile 9.5 mm cl. Northwest Providence 

 Channel, Bahamas. Cephalothorax lat- 

 eral view. Scale = 3 mm. 



ing from about 0.65 to 0.85 that of carapace. 

 Rostral plus epigastric teeth 10-19 (rarely <13 or 

 >16), basal rostral teeth close together, those to- 

 ward apex variously spaced; second or first (latter 

 usually in young) rostral tooth situated in line 

 with orbital margin. Postrostral carina low, al- 

 though well defined, behind epigastric tooth end- 

 ing at about level of dorsal extremity of cervical 

 sulcus; small dorsal tubercle located near pos- 

 terior margin of carapace. Antennal and hepatic 

 spines subequal in size, latter situated distinctly 

 ventral to antennal spine. Anteroventral angle of 

 carapace broadly obtuse (Figure 3L4). Antennal 

 carina short; cervical carina sharp, accompanying 

 sulcus well marked; hepatic carina sigmoid an- 

 teriorly (from below hepatic spine to apex of 

 pterygostomian spine), hepatic sulcus well 

 marked along carina, shallow posteriorly. Bran- 

 chiocardiac carina very weak, extending pos- 

 terodorsally to near margin of carapace. 



Antennular peduncle with length equivalent to 

 about 0.70 that of carapace, third article sexually 

 dimorphic, slightly longer and considerably stout- 

 er in males than in females, about 1.4 times as 

 long as second in former and 1.2 times in latter; 

 prosartema reaching, or almost reaching, disto- 

 mesial margin of eye; distolateral spine long, 

 slender, and sharp, reaching between midlength 



752 



and distal fourth of second article; stylocerite end- 

 ing in small spine, about 0.4 as long as first article. 

 In male, ventral flagellum shorter (even when for- 

 cibly straightened) than dorsal, with inconspicu- 

 ous knob at junction between proximal and distal 

 parts; dorsal flagellum 1.5-1.8 times as long as 

 carapace. In female, ventral flagellum (tapering to 

 filiform distal part) longer than dorsal, 1.5-1.7 

 times as long as carapace; dorsal flagellum 0.8-1.0 

 times as long. 



Scaphocerite falling slightly short of to some- 

 what overreaching antennular peduncle; lateral 

 rib ending in slender spine, falling short of distal 

 margin of lamella. Antennal flagellum long, about 

 3 times tl of shrimp ( based on measurements made 

 by me on freshly collected specimens during a 

 Caribbean Sea cruise of Oregon II in 1969). 



Third maxilliped extending at least to basal 0.4 

 of second antennular article and at most to distal 

 end of third; ratio of dactyl/propodus about 0.75 in 

 males and 0.85 in females. 



First pereopod reaching distal end of carpocer- 

 ite or overreaching it by as much as 0.8 length of 

 propodus. Second pereopod surpassing carpocerite 

 by at least length of propodus and by as much as 

 that of propodus and half length of carpus (i.e., 

 reaching between base of second antennular arti- 

 cle and midlength of third). Third pereopod 



