8 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



Pseudophilomedes 



Pseudophilomedes G. W. Miiller, 1894, p. 211. 

 Paramekedon Brady and Norman, 1896, p. 670. 



Type species. — Pseudophilomedes foveolatus Muller, 1894. 

 Gender. — Masculine. 

 Diagnosis. — Same as for family. 



Key to Species of Pseudophilomedes 



(species in brackets not described in present paper) 



1. Shell with longitudinal ridges [P. angulatus Miiller, 1894] 



Shell without longitudinal ridges 2 



2. Endopodite of 2nd antenna with 2 short bristles 



[P. Inflatus (Brady and Norman, 1896)] 

 Endopodite of 2nd antenna with more than 2 short bristles 3 



3. Endopodite of 2nd antenna with 3 short bristles P. foveolatus 



Endopodite of 2nd antenna with 4 short bristles P. ferulanus 



Pseudophilomedes ferulanus 



Figures 1-6; Plate 1 



Pseudophilomedes ferulana Kornicker, 1959, p. 235, figs. 46, lA-B, 2A-B; 56, 

 A-D.— Darby, 1965, pp. 64-70, fig. 10, pis. 11, 12. 



Holotype. — USNM 113287; male; complete dry specimen. Spec- 

 imens from Atlantic Shelf, 8 specimens: USNM 113020-113022. 



Material. — The nmnber of specimens, locations of sampling 

 stations, and some environmental factors concerning specimens 

 collected from the Atlantic Shelf are presented in table 2. All 

 specimens sufficiently developed for determining sex were females. 

 Five specimens were dissected for this study. 



Supplemental description of female (male unknown). — -Shell 

 (fig. 3) : Oval, highest anterior to center, Avidest posterior to center; 

 posterior process slightly below middle of valve; rostriun subtrian- 

 gular with nearly horizontal lower margin; antennal sinus shallow; 

 surface punctate; each valve with arcuate sulcus extending from 

 dorsal margin to near middle of valve; left valve overlaps right valve 

 along anterodorsal and posterodorsal margins; hinge simple, extending 

 from highest point on valve to posterodorsal corner; about 15 muscle 

 scars in front of and below middle of each valve (fig. 3c), additional 

 muscles are attached near anterodorsal corner of valve (fig. Sh). 

 Inner lamella broadest behind rostrum and in front of posterior 

 projection; radial pore canals numerous (fig. 3/) ; selvage with lamellar 

 prolongation and fringing hairs (fig. 3^) ; inner lamella behind rostrum 

 with row of 4 bristles ^nth short marginal hairs (fig. 3d) ; inner lamella 

 in front of posterior process \vith row of 6 hirsute setae (fig. 3e) ; inner 



