PROCEEDINGS OF THE NATIONAL MUSEUM 



Figure 9. — Euphilomedes asper, shell: a, lateral outline showing muscle scars, punctae only 

 on part of rostrum and along posteroventral margin. Medial view of valves: b, rostrum, 

 right; c, posterior process, right; d, anteroventral part of inner lamella, right; lamellar 

 prolongation of selvage not shown; e, muscle scars, right;/, rostrum, left, lamellar prolon- 

 gation of selvage not shown; g, posterior process, left, lamellar prolongation of selvage not 

 shown; h, anteroventral part of inner lamella, left; i, muscle scars, left. Antenna: ;, 

 right 1st, ends of many bristles not shown; k, endopodite of 2nd; /, lateral view, pro- 

 topodite, exopodite, and joint 2 of endopodite of 2nd, bristles on joints 3-9 of exopodite 

 not shown. (Same scale, in microns: a; b, c, e-g, i, k; d, h, j, I. All from spec. A.) 



