396 CALIFORNIA ACADEMY OF SCIENCES. 



EXPLANATION OF PLATE XVIL 



Fig. I. Tercbratalia hemphilli Dall. Pliocene, Santa Barbara. View of pedicle valve. 



Long^itude 57 mm. ; xo.6. 92 



Fig. 2. Same. Lateral view of both valves; xo.6. 92 



Fig. ■},■ Same. View of brachial valve; xo.6. 92 



Fig. 4. Leda hamafa Carpenter. Lower San Pedro series, Deadman Island. Longitude 



9.5 mm.; X4-5- 97 

 Fig. 5. Leda taphria Dall. Lower San Pedro series, Deadman Island. Longitude 



9.6 mm.; X4. 98 

 Fig. 6. Leda mvuda var. precursor, var. nov. Lower San Pedro series, Deadman Island. 



Type specimen. Longitude 9 mm.; X5. 97 



Fig. 7. Leda fossa Baird. Lower San Pedro series, Deadman Island. Longitude 



13.5 mm.; x3-2- 96 



Fig. 8. Mytilimeria riuttalli Conrad. Lower San Pedro series, Deadman Island. Altitude 



17 mm. ; x i-4. 126 



Fig. 9. Terebratatia smilhi, sp. nov. Pliocene, Deadman Island. Type specimen. Alti- 

 tude 50 mm. ; natural size. 93 



Fig. 10. Verlicordia novemcostata Adams & Reeve. Lower San Pedro series, Deadman 



Island. Longitudes mm.; X4.5. 126 



Fig. II. Corbula luteola Carpenter. Lower San Pedro series, Deadman Island. Longi- 

 tude 8 mm.; X3. 181 



Fig. 12. Bor7iia retiferaXyAiA^. Lower San Pedro series, Deadman Island. Interior view, 



showing hinge. Longitude 7.5 mm.; X4. 136 



Fig. 13. Yoldia scissurata Dall. Lower San Pedro series, Deadman Island. Longitude 



12.7 mm.; X4- 99 



