FISHERY BULLETIN: VOL. 75. NO. 2 



FIGURE 30.—Pleoticus robustus, 6 28 mm cl, south of Dry Tortugas, Fla. A, Antennular flagella. S, Mesial view of proximal part of 

 ventral flagellum. C, Lateral view of same. D, Ventrolateral view of proximal portion (distal half) of dorsal flagellum. E, Eye, 9 34 

 mm cl, same locality. 



corresponding second maxilliped; pleurobranchia, 

 and anterior and posterior arthrobranchiae on 

 somite IX (Figure 31E, F), pleurobranchiae 

 present through somite XIV, and both arthro- 

 branchiae through XIII. Third maxilliped exceed- 

 ing antennular peduncle by at least 0.5 length of 

 dactyl, or by dactyl and about 0.2 length of 

 propodus. 



First pereopod reaching between base and distal 

 end of carpocerite. Second pereopod overreaching 

 carpocerite by at least 0.5 length of dactyl, but 

 by as much as entire propodus and 0.1 length of 

 carpus. Third pereopod surpassing antennular 



peduncle by length of dactyl or by length of 

 propodus and 0.2 that of carpus. Fourth pereopod 

 extending to distal end of carpocerite or over- 

 reaching it by length of dactyl and 0.5 that of 

 propodus. Fifth pereopod exceeding antennular 

 peduncle by at least 0.5 length of dactyl or by 

 length of dactyl and 0.4 that of propodus. Order of 

 pereopods in terms of their maximal anterior ex- 

 tensions: first, second, fourth, third, and fifth. 

 First pereopod with moderately long, sharp spine 

 at distomesial extremity of basis and ischium, and 

 midlength of merus. In female, coxa of third pereo- 

 pod expanded into thick, roughly trapezoidal plate, 



300 



