EXPLANATION OF PLATE 37 



Figures approximately natural size. 



Fig. la. Eiicope tenuis Kew. Cotype, specimen 10031, Univ. Calif. Coll. 

 Invert. Pal. Lower surface of test. Coyote Mountain, Imperial County, Calif., 

 Univ. Calif, loc. 2064. Lower Division of Carrizo Creek beds. Pliocene. 



Fig. lb. Encope tenuis Kew. Specimen 10050. Lateral surface of test. 



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