218 FLABELLIFERA • SPHAEROMATIDAE 



nounced. Uropodal rami lamellar. 6 pleopod 2 with copulatory stylet 

 basally narrow, reaching to or just beyond distal margin of endopod. 



Ischyromene barnardi (Menzies and Glynn, 1968) 

 Figure 95D 



DIAGNOSIS 6 4.5 mm, 9 3.7 mm. Both sexes lacking processes on pereon 

 and pleon. Accessory unguis of pereopods often bifid. Pleopod 3, exopod of 

 single article. Uropodal rami lamellar. 6: Pereonite 7, posterior margin 

 bilobed. Penes short, separate to base. 



RECORDS Puerto Rico, intertidal. 



Paracerceis Hansen, 1905b 



DIAGNOSIS Pleopod 3 exopod with transverse suture in distal half Pleon 

 with two long sutures reaching to posterolateral margin. 6: Penial rami 

 short, separate. Pleotelson with basal area strongly vaulted; deep posterior 

 notch sometimes having denticles on inner margins, and/or median tooth at 

 base of notch. Uropodal endopod short, fused with sympod; exopod elongate, 

 club shaped. 9: Mouthparts metamorphosed. Mandible fused with 

 cephalon. Broodpouch of four pairs of oostegites, three posterior pairs over- 

 lapping. Brood retained in internal pouches. Uropodal rami subequal, lamel- 

 lar. Pleon usually less ornamented than in 6, and with shallower median 

 notch lacking teeth. 



Key to species of Paracerceis (P. nuttingi not included) 



1. 6, pleotelsonic notch narrow, with median basal tooth; 9, pleotelson 



dorsally unornamented 2 



6, pleotelsonic notch wide, with lateral teeth; 9, pleotelson dorsally 

 with tubercles 3 



2. S, median tooth of pleotelsonic notch almost as long as notch; 



subacute median tubercle on anterior pleotelson; 9 , pleotelson with 



posterior margin faintly concave, not notched edithae 



S , median tooth less than half length of notch; pleotelson with blunt 

 rounded median tubercle; 9 , pleotelson with distinct posterior notch 

 glynni 



