EXPLANATION OF PLATE 21 



Fig. Ifl.. Astrodapsis ornatus Kew, ii. sj^. Cotype, specimen 11374, Univ. Calif. 

 Coll. Invert. Pal. Upper surface of test. Natural size. San Juan Eiver district, 

 San Luis Obispo County, Calif., Univ. Calif, loe. 2721. Upper San Pablo group 

 (Santa Margarita fonnation), Upper Miocene. 



Fig. lb. Astrodapsis ornatus Kew, n. sp. Cotype, specimen 11375, Univ. 

 Calif. Coll. Invert. Pal. Lateral surface of test. Natural size. Same locality. 



Fig. Ic. Astrodapsis ornatus Kew, n. sp. Specimen 11375. Upper surface of 

 test. Natural size. 



Fig. Id!. Astrodapsis ornatus Kew, n. sp. Specimen 11375. Lower surface of 

 test. Natural size. 



Fig. 2. Astrodapsis scuteJliformis Kew, n. sp. Holotype, specimen 11048, 

 Univ. Calif. Coll. Invert. Pal. Upper surface of test. X 2. Univ. Calif, loc. 

 2354. 



Fig. 3a. Astrodapsis arnoldi arnoldi (Pack). Holotype, specimen 11030, Univ. 

 Calif. Coll. Invert. Pal. Upper surface of test. Natural size. Salinas Valley, 

 Monterey County, Calif. Lower Etchegoin (Jacalitos) formation. Lower Pliocene. 



Fig. 3li. Astrodapsis arnoldi arnoldi (Pack). Same specimen. Lower surface 

 of test. Natural size. 



Fig. 3c. Astrodapsis arnoldi arnoldi (Pack). Same specimen. Lateral sur- 

 face of test. Natural size. 



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