PROC US. NAT. MUS. VOL. 121 



KORNICKER— PLATE 1 



Pseudophilomedes ferulanus, sections: a, ligament and left valve overlapping right on 

 anterodorsal margin of carapace; b, ligament and muscle to median eye on dorsal margin 

 at highest part of carapace; c, hinge and ligament near posterior of hinge; d, free margin 

 at anteroventral part of left valve; e, free margin at anterodorsal part of left valve; /, 

 free margin at ventral part of right valve; g, side of left valve showing spiral pore canal 

 leading to hair and reticulate pattern of shell, inner lamella at left; k, attachment of 

 adductor muscles on left valve; i, sockets of two medial bristles of caudal process. 

 (Photographs taken with oil immersion objective, lOOx.) 



