Plate 32. 
Page 
igure la. Mya arenaria Linnaeus..198 
lb. Mya arenaria Linnaeus.198 
2a. Platyodon cancellatus Conrad .202 
2b. Platyodon cancellatus Conrad .202 
This plate is from the University of California Publ. 
Vol. 14, Zoology. 
