PLATE XXYI. 
Fernando (Pliocene) Pecten. 
(Unless otherwise indicated all figures are two-thirds natural size.) 
Fig. 1. Pecten ( Patinopecten) healeyi Arnold. U.S.N.M. 148012. Holotype. Right 
valve; altitude 121 mm. View of exterior. San Diego formation (Pli¬ 
ocene), San Diego County, Cal. Characteristic of the Fernando forma¬ 
tion throughout the Coast Range. 
Fig. 2. Pecten ( Patinopecten) healeyi Arnold. U.S.N.M. 154162. Paratype. Left 
valve; altitude 141 mm. View of exterior. San Diego formation (Pli¬ 
ocene), Pacific Beach, San Diego County, Cal. 
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