PATAGONIAN EXPEDITIONS I PALEONTOLOGY. 



EXPLANATION OF PLATE XXIV. 



PAGE 



Fig. i . PECTEN ACTINODES Sow. . . . . . . ' . . . 119 



Cape Fairweather beds ; Cape Fairweather. 

 la. Right valve. 



ib. Left valve of another individual. 

 Fig. 2. PERN A QUADRISULCATA v. Ih. . . . . . . . . 97 



Patagonian beds. 



2a. Hinge of right valve. Mouth of Santa Cruz River. 



2b. Cast of an almost complete specimen. Lake Pueyrredon, 



base. 

 Fig. 3. MYTILUS MAGELLANICUS Chemn. . . . . . . . "121 



Patagonian beds ; Oven Point, San Julian. 



Inner and outer casts, imbedded in matrix. 

 Fig. 4. MODIOLA ANDINA Ortm. . . . . . . . . 122 



Patagonian beds ; Lake Pueyrredon, 400' above base. 

 Cast. 



All the figures are natural size. 



(VOL. iv) 



