14 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
S60 e\e-0/piaiove 
Ficure 4.—Euphilomedes multichelata, female (USNM 112985): a, lateral view, showing 
muscle scars; b, dorsal view with polygons shown on right valve; c, ventral view, anterior 
to right; d, three hairs from shell: long tapered hair from posterior margin, short tapered 
hair from radial pore canal on posterior margin, blunt hair from rostrum; e, muscle scars 
and portions of ornamentation in vicinity of scars, right valve from inside, anterior to left; 
f, medial view, anterior right valve; g, medial view, posterior right valve; h, medial view, 
ventral section, right valve; i, medial view, hinge section, right valve. (Same scale, in 
microns: a-c; d; ¢,i; f-h.) 
