PATAGONIAN EXPEDITIONS : PALAEONTOLOGY. 
PAGE 
Fig. 9. Crassatellites lyelli (Sow.) • • • • • • • 123 
Patagonian beds ; mouth of Santa Cruz River. 
9 a. Outer view of left valve. 
9 b. Inner view of the same. 
Fig. 10. Crassatellites kokeni (v. Ih.) • • • • • • 123 
Patagonian beds ; mouth of Santa Cruz River. 
10a. Outer view of right valve. 
10 b. Inner view of the same. 
All of the figures, unless otherwise stated, are natural size. 
(VOL. IV) 
