o." 



80 CALIFOHNIA ACADEMY OV SCIENCES. 



EXPLANATION OF PLATE IX. 



Fig. I. Pleiiroioma ( Borsonia) barlscki, sp. nov. Lower San Pedro series, Deadman 



Island. Type specimen. Longitude 18.5 mm.; X3-4. 200 



Fig. 2. Bittinm quadrifilatum Carpenter. Lower San Pedro series, Deadman Island. 



Longitude 10 mm.; X3- 292 



Fig. 3. Mangilia striosa C. B. Adams. Upper San Pedro series, Los Ccrritos. Longitude 



9.4 mm.; X3- 215 



Fig. 4. Plcurotovia ( Leiuosyrinx) pedroana, sp. nov. Lower San Pedro series, Deadman 



Island. Type specimen. Longitude 17 mm.; X3. 202 



Fig. 5. Mangilia hooveri, sp. nov. Upper San Pedro series, San Pedro. Type specimen. 



Longitude 11 mm.; X3. 212 



Fig. 6. Act(€07i ( Rictaxis) punclocmlata Carpenter. Upper San Pedro series, San Pedro. 



Longitude 5.9 mm.; X3. 189 



Fig. 7. Mangilia (Taranis) sirongi, sp. nov. Lower San Pedro series, Deadman Island. 



Type specimen. Longitude 12 mm.; X3.5. 215 



Fig. 8. Columbella ( Anackis) mt7iima,sp. nov. Upper San Pedro series, San Pedro. Type 



specimen. Longitude 5.5 mm.; X3. 237 



Fig. 9. Eulima kas/ata Sowerby. Upper San Pedro series, San Pedro. Longitude 



10 mm.; X3-4- 268 



Fig. 10. Mangilia (Cythara) hranneri, sp. nov. Lower San Pedro series, Deadman Island. 



Type specimen. Longitude 10 mm.; X3.2. 2U 



Fig. II. Ocinebra lurida \^\. cancellina Philippi. Upper San Pedro series, San Pedro. 



Longitude 21 mm.; X2. 257 



Fig. 12. Eulima micans Carpenter. Lower San Pedro series, Deadman Island. Longi- 

 tude 12 mm.; XS-S. 269 



Fig. 13. Planorbis tumidus Peeikper. Up|)er San Pedro series, San Pedro. Ma.xinium 



diameter 12.7 mm. ; X3. 195 



Fig. 14. Planorbis verviicularis Gould. U|)per -San Pedro series, San Pedro. Ma.ximum 



diameter 1 1.5 mm.; X3- I95 



Fig. 15. Eulima falcata CARPENTER. Lower San Pedro series, Deadman Island. Longi- 

 tude 7 mm.; X3. 268 



Fig. 16. Etipleura iniiriciformis Broderip. Upper San Pedro series, San Pedro. Longi- 

 tude 33 mm. ; natural size. 248 



Fig. 17. Scala bellastriata Carvkt^tkr. Figure of living shell from .San Pedro. Longitude 



18 mm.; X 2. 263 



