492 axel a. olsson 



Explanation of Plate 19 



Figure Page 



1-lb. Aeqnipecten (Plagiocteninm) purpuratns (Lamarck) 162 



Fig. 1, right valve, height 72.2 mm. Bayovar, Peru; Fig. la, left 

 valve, height 62 mm. Bayovar, Peru; Fig. lb, end view, diameter 

 29.6 mm. Bayovar, Peru. PRI 25607. 



2-2b. Aeqnipecten (Plagiocteninm) circularis (Sowerby) 163 



F.g. 2, right valve, height 56.2 mm.; Fig. 2a, right valve, height 

 47.3 mm.; Fig. 2b, end view height 56 mm., diameter 36.5 mm. 

 Panama. PRI 25608. 



3-3a. Pecten (Flabellipecten) sericeus Hinds 160 



Right and left valve, height 56.2 mm. Arena Bank, Gulf of California. 

 California Academy of Sciences, No. 17715. 



