Plate 36. 
Page 
Figure 1. Zirfcca gabbi Tryon........210 
Exterior of left valve siphons extended. 
2a. Parapliolcis califoniica Conrad.210 
Ventral aspect. Moss Beach. 
2b. Parapholas californica Conrad.210 
Dorsal aspect of same specimen. 
This plate is from the University of California Publ. 
Vol. 14, Zoology. 
