PATAGONIAN EXPEDITIONS : PALEONTOLOGY. 
EXPLANATION OF PLATE XXIII. 
PAGE 
Fig. i. Pecten cf. centralis Sow. . . . . . . . . 116 
Patagonian beds ; Port Desire, 
i a. Right valve. 
ib. Left valve of the same individual. 
Note. Both valves in fragments; in fig. ib the fragments have not been 
imbedded quite correctly in the plaster. 
Fig. 2. Pecten geminatus Sow. . . . . . . . . 117 
Patagonian beds. 
2 a. Small right valve, agreeing with Sowerby’s type ; Oven 
Point, San Julian. 
2 b. Small left valve of another individual ; Oven Point, San 
Julian. 
2 c. Larger right valve ; Oven Point, San Julian. 
2 d. Right valve of var. quemadensis v. Ih. ; Darwin Station, San 
Julian. 
2e. Lateral view of both valves, the same individual as fig. 2d. 
All the figures are natural size. 
(VOL. IV) 
