46 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 



PREHISTORIC FUANA OF CALIFORNIA. 



PLATE 2. 



Dr. Cooper's recently described species, continued. 

 (The figures 20 to 30 in this Plate are double the natural size.) 



20-21. Sur cilia Inconstant. Cooper. In variety. Marysville 

 Bifttes, California. 



22. Cordiera graciUima, Cooper. Plications not well figured. 

 Marysville Buttes, California. 



23-24. Pleurotoma Perkinsiana, Cooper. Figures too wide. 

 Marysville Buttes, California. 



25-26. Mangilia suturalis, Cooper. Nodules too prominent 

 Marysville Buttes, California. 



27. Drillia Ullrcyana, Cooper. Outlines not very correct. 

 Marysville Buttes, California. 



28-29. Snrcula monilifera, Cooper. Marysville Buttes, Cali- 

 fornia. 



30. Bittium Io)igissh)iii)n, Cooper. Marysville Buttes, Cali- 



fornia. 



31. fitsiis snpraplamis, Cooper. Cretaceous. San Diego, Cali- 



fornia. 



32. Pleiirotomo ? decipiens. Cooper. Cretaceous. San Diego, 



California. 



33-34. CaUiostonia Keuipiana, Cooper. 



35. Tornatina ? crrafica. Cooper. Cretaceous. San Diego, Cali- 

 fornia. 



3637. Tornatella normalis, Cooper. Cretaceous. San Diego, 

 California. 



38-39. Siphonaria capiiloidcs. Cooper. Cretaceous. San Diego, 

 California. 



40. CreneUa santana, Cooper. Cretaceous. San Diego and Or- 



ange Co., California. 



41. Mitra siniplicissinia. Cooper. Cretaceous. San Diego, Cali- 



fornia. 



42. Corbula triangnlata. Cooper. Cretaceous. San Diego, Cali- 



fornia. 

 The oblique lines on the anterior end were intended for shad- 

 ing. 



