372 CALIFORNIA ACADEMY OF SCIENCES. 



EXPLANATION OF PLATE V. 



Fig. I. Odnebra barbarensis Gaub. Lower San Pedro series, Deadman Island. Lon- 



jjilude 19 mm.; X2. 254 



Fig. 2. Ocinebra poiilsoni Nuttai,l. Ujjper San Pedro series, San Pedro. Longitude 



31 mm.; X2.7. 260 



F'S- 3- Scala lincla Carpenter. Upper San Pedro series, San Pedro. Longitude ig 



mm.; X2. 265 



Fig. 4. Scala indianotum Carpenter. Upper San Pedro series, San Pedro. Longi- 

 tude 21 mm. ; X2. 264 

 I'.U- 5- Ocinebra liirida van ccrritensis, var. nov. Upper San Pedro series. Crawfish 



George's. Type specimen. Longitude 17 mm.; Xi.3. 258 



Fig. 6. Columbella ( yRsopus) chrysalloidea Carpenter. Upper San Pedro series, San 



Pedro. Longitude 11 mm.; X 2. 237 



P'&- 7- Pleiirotoma ( Borsonia) barlschi, sp. nov. Lower San Pedro series, Deadman 



Island. Short variety. Longitude 14 mm.; Xi-3- 200 



Fig. 8. Drillia hcmphilli Stearns. Upper San Pedro series, San Pedro. Longitude 16 



mm.; X2.5. 204 



Fig. g. Ocinebra keepi, sp. nov. Upper San Pedro series, Deadman Island. Type 



specimen. Longitude 35 mm.; X2. 256 



Fig. 10. Drillia inermis Hinds. Upper San Pedro series, San Pedro. Longitude 22 mm.; 



X1.25. 205 



Fig. II. Amphissa vetilricosa, sp. nov. Lower San Pedro series, Deadman Island. Type 



specimen. Longitude 13 mm.; X2. 242 



Fig. 12. Ocinebra lurida var. aspera Baird. Upper San Pedro series, San Pedro. Lon- 

 gitude 28 mm.; X2. 257 

 Fig. 13. Margarita oplabilis var. nodosa, var. nov. Lower San Pedro series, San Pedro. 



Type specimen, tilted back. Altitude 6.g mm.; X4. 332 



Fig. 14. Margarita oplabilis var. hiechli, var. nov. Lower San Pedro series, San Pedro. 



Type specimen, tilted back. Altitude 8 mm. ; X3- 332 



Fig. 15. Ocinebra micheli Ford. Upper San Pedro series, Crawfish George's. Longitude 



16 mm.; X 2.5. 259 



Fig. 16. Margarita parcipicta xzv. pedroana,\3.r. nov. Lower San Pedro series, San Pedro. 



Type specimen, tilted back. Altitude 5.5 mm. ; X4. 333 



