FISHERY BULLETIN: VOL. 71, NO. 2 



of proximal fourth forming excavation bearing 

 strong setae on its proximal side, and tapering 

 distally; first pereopod extending as far as, 

 or very slightly beyond, third maxilliped; 

 second pereopod reaching midlength of third 

 antennular segment or surpassing it by tip 

 of dactyl; third pereopod reaching distal end 

 of antennular peduncle or exceeding it by 

 almost 0.5 length of dactyl; fourth pereopod 

 surpassing antennular peduncle by length of 

 dactyl and 0.2 to 0.5 that of propodus; fifth 

 pereopod overreaching antennular peduncle 

 by length of dactyl and 0.5 or entire length of 

 propodus — last two pairs of pereopods, es- 

 pecially their dactyls, slender. Ischium of 

 third maxilliped bearing minute distomesial 

 spine; merus of first and second pereopods with 

 ventral distomesial spine movable, and rather 

 stout. In females, coxae of last three pairs of 

 pereopods produced mesially into plates covered 

 with long setae and bearing anteriorly promi- 

 nent, blunt tooth. In males, coxae of fifth pair 

 of pereopods with large, obtuse to strongly 

 acute tooth on anteromesial margin. 



Abdomen with middorsal carina extending 

 from about midlength of third somite through 

 sixth, carina rounded on third, sharp from 

 fourth posteriorly; posterodorsal margin of 



third somite bearing broad-based, prominent 

 spine, its length 0.3 of, to equivalent to, 

 distance between transverse sulcus and posterior 

 margin of somite; posterodorsal margin of 

 fourth and fifth somites varying from straight 

 (Figure 1) to armed with well-developed, small 

 spine (Figure 3B, C); sixth somite bearing 

 small spine at posterior end of dorsal carina, 

 paired posteroventral teeth, and two pairs of 

 prominent lateral cicatrices; latter occasionally 

 almost fused into one. Telson with four pairs 

 of lateral minute, movable spines, posteriormost 

 pair flanking very small terminal portion; 

 median sulcus short, disappearing well anterior 

 to terminal portion, mesial ramus of uropod 

 longer than telson, and lateral ramus consider- 

 ably overreaching mesial. 



Petasma (Figure 6A, B) with median lobe 

 tapering distolaterally from distal extremity 

 of row of cincinuli (hooklike structures along 

 mesial margin of median lobes of petasma that 

 serve to interlock its two halves), and with 

 elongate, subelliptical, sclerotized lapel on inner 

 surface, extending along distomesial margin; 

 lateral lobe very broad proximally, narrower 

 and rounded distally; ventral costa with distal 

 0.4-0.5 of its length free from adjacent portion 

 of ventrolateral lobule, and strongly curved 



Figure 4. — Hepomadus tener. Ventral 

 views of labra: A. ^ 43.5 mm c.L, S of 

 Santa Rosa Island, Fla. B. ■? 44 mm c.l., 

 off Back Bay, Va. 



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