EXPLANATION OF PLATE 39 



Figures approximately natural size. 



Fig. la. Cassidulus {Ehynclwpygus) calif ornicus (F. M. Anderson). Neo- 

 type, specimen 113-48, Univ. Calif. Coll. Invert. Pal. Upper surface of test. Salt 

 Creek, north of Coalinga, Fresno County, Calif., Univ. Calif, loc. 3131. Tejon 

 formation (Avenal sands), CTpper Eocene. 



Fig. Ih. Cassiduhts (Ehi/nehopygus) calif ornicus (F. M. Anderson). Same 

 specimen. Lower surface of test. 



Fig. Ic. Cassidulus {Bliijnchopi/gus) californicus (F. M. Anderson). Same 

 specimen. Lateral surface of test. 



Fig. Id. Cassidulus (Bhynchopygus) cxilif ornicus (F. M. Anderson). Same 

 specimen. Posterior surface of t-est. 



Fig. 2a. Cassidulus (Shynchopygus) ynezensis Kew, n. sp. Holotype, speci- 

 men 11345, Univ. Calif. Coll. Invert. Pal. Upper surface of test. Oso Canon, 

 Santa Ynez Eiver district, Santa Barbara County, Calif., Univ. Calif, loc. 3132. 

 Vaqueros formation. Lower Miocene. 



Fig. 25. Cassidulus {Rhyncliopygus) ynezens-is Kew, n. sp. Same specimen. 

 Lower surface of test. 



Fig. 2c. Cassidulus (Eltynchopygus) ynezensis Kew, n. sp. Same specimen. 

 Lateral surface of test. 



Fig. 2d. Cassidulus (Bhynchopygus) ynezensis Kew, n. sp. Same specimen. 

 Posterior surface of test. 



Fig. 3rt. Cassidulus (Bliynclioxiygus) eUipticus Kew, n. sp. Cotype, specimen 



11346, enlarged approxLinately one-third natural size, Univ. Calif. Coll. Invert. Pal. 

 Upper surface of test. Oso Caiion, Santa Ynez Eiver district, Santa Barbara 

 County, Calif., Univ. CaUf. loc. 3132. Vaqueros formation. Lower Miocene. 



Fig. 31). Cassidulus (Bhynchopygus) eUipticus Kew, n. sp. Cotype specimen 



11347, Univ. Calif. Coll. Invert. Pal. Lower surface of test. Univ. Calif, loc. 3132. 

 Fig. 3c. Cassidulus (Bhynchopygus) eUipticus Kew, n. sp. Specimen 11346. 



Lateral surface of test. 



Fig. Sd. Cassidulus (BJiynchopygus) eUipticus Kew, n. sp. Specimen 11346. 

 Posterior surface of test. 



Fig. 4a. Cassidulus (Bhynchopygus) mexicanus Kew, n. sp. Holotype, speci- 

 men 11357, LTniv. Calif. Coll. Invert. Pal. Upper surface of test. Approximately 

 reduced one half. San Ysidro, Lower California. Pliocene (?). 



Fig. 4:1). Cassidulus (Bhynchopygus) mexicanus Kew, n. sp. Same specimen. 

 Lateral surface of test. X V2. 



Fig. 4o. Cassidulus (Bhynchopygus) mexicanus Kew, n. sp. Same specimen. 

 Posterior surface of test. X %. 



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