PATAGONIAN EXPEDITIONS ! PALEONTOLOGY. 
EXPLANATION OF PLATE XXVIII. 
Fig. i. Venus difficilis Ortm. ........ 
Magellanian beds ; Punta Arenas. 
i a. Left valve (of double shell), interior view, showing hinge. 
Lower Magellanian beds. 
lb. Cardinal view of both valves of the same individual, 
i c. Outer view of a left valve. Upper Magellanian beds. 
Fig. 2. Venus arenosa Ortm. ........ 
Upper Magellanian beds ; Punta Arenas. 
2 a. Outer view of right valve. 
2 b. Hinge of the same. 
Fig. 3. Venus volckmanni Phil. ........ 
Patagonian beds ; mouth of Santa Cruz River. 
3#. Outer view of a left valve of a double individual. 
3b. Cardinal view of both valves of the same. 
Fig. 4. Venus darwini Phil. ......... 
Patagonian beds ; mouth of Santa Cruz River. 
Outer view. 
Fig. 5. Meretrix iheringi Cossm. ........ 
Patagonian beds ; Punta Arenas. 
5 a. Outer view of fragment of left valve. 
5 b. Hinge of the same. 
Fig. 6. Meretrix rostrata (Kch.). ........ 
Cape Fairweather beds ; Cape Fairweather. 
Cast of left valve, with fragments of shell remaining. 
Fig. 7. Dosinia l^eviuscula (Phil.). ... . 
Patagonian beds ; mouth of Santa Cruz River. 
Outer view of left valve. 
Fig. 8. Tellina jeguaensis v. Ih. ........ 
Patagonian beds ; Arroyo Gio. 
Cast of left valve. 
All the figures are natural size. 
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