PATAGONIAN EXPEDITIONS: ZOOLOGY. 



EXPLANATION OF PLATE XLI.C 



Figs. I, 2. LiTTORIDINA CHARRUANA (d'Orb.) . 



Figs. 3, 4, 8. LiTTORIDINA AUSTRALis (d'Orb-). Montevideo 

 Figs. 5, 6, 7. " " " Bahia Blanca 



Fig. 9. LiTTORIDINA BERTONiANA Pils. Face of type. 



Figs. ID, II. PoTAMOPYRGUS scoTTi " " " two cotypes 



Fig. 12. PoTAMOPYRGUS PETiNiNGENSis (Gld.). Topotype from the orig 



inal lot ........ . 



Fig. 13. LiTTORIDINA piciUM (d'Orb.) ...... 



Figs. 14, 14a. Idiopyrgus souleyetianus Pils. Profile and face of the type 



558 

 557 

 557 

 559 

 563 



563 

 558 

 565 



(vol. Ill) 



