EXPLANATION OF PLATE 15 



Figures approximately natural size. 



Fig. 1«. Asirodapsw major (Kew). Cotype, specimen 11003, Univ. Calif. 

 Coll. Invert. Pal. Upper surface of test. South side of Mount Diablo, Contra 

 Costa County, Calif., Univ. Calif, loc. 1742. U^^pennost beds of the San Pablo 

 gi'oup, Lower Pliocene. 



Fig. lb. Astrodaps-is major (Kew). Cotype, specimen 11337, Univ. Calif. 

 Coll. Invert. Pal. Lower surface of test. Univ. Calif, loc. 1742. 



Fig. Ic. Astrodapsis major (Kew). Specimen 11003. Lateral surface of 

 test. 



Fig. 2a. Astrodapsis arnoldi peltoides (F. M. Anderson and B. Martin). 

 Specimen 451, Calif. Acad. Sei. Coll. Invert. Pal. Upper surface of test. Head 

 of Zapato Chino Creek, Fresno County, Calif., Calif. Acad. Sci. loc. 293. Trophon 

 zone, Lower Etchegoin (Jacalitos) formation, Lower Pliocene. 



Fig. 2Z). Astrodapsis arnoldi peltoides (F. M. Anderson and B. Martin). 

 Specimen 451. Lateral surface of test. 



Fig. 3. Astrodapsis arnoldi peltoides (F. M. Anderson and B. Martin). 

 Specimen 11336, Univ. Calif. Coll. Invert. Pal. Upper surface of test of an oval- 

 shaped specimen. Coalinga district, Fresno County, Calif., Univ. Calif, loc. 2675. 

 Lower Etchegoin (Jacalitos) formation, Lower Pliocene. 



Fig. 4o. Astrodapsis altus Kew. Holotype, specimen 10065, Univ. Calif. Coll. 

 Invert. Pal. Upper surface of test. Contra Costa County, Calif., Univ. Calif, 

 loc. 1950. Ujjper San Pablo group, Upper Miocene. 



Fig. ib. Astrodapsis altus Kew. Same specimen. Lateral surface of test. 



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