PATAGONIAN EXPEDITIONS I ZOOLOGY. 



EXPLANATION OF PLATE XLII. 



PAGE 



Figs, i, la, 16. RADIODISCUS PATAGONICUS (Suter). On the Rio Chico, 



50 miles above the Sierra Oveja . . . . 517 

 Figs. 2, 3. SUCCINEA BURMEISTERI Doering. Rio Chico, 50 miles 



above the Sierra Oveja . 520 

 Figs. 4-6. " " Doering. Seven miles above 



the Sierra Ventana . . 520 



F'g s - 7> 7 a > 8. LlTTORIDINA HATCHERI PHs. 553 



Figs. 9, 10. LITTORIDINA SIMPLEX Pils. Cotypes . . . . 555 



Figs, ii, na, 12, 13. LITTORIDINA HATCHERI Pils. 40 miles above Sierra 



Oveja 555 



(VOL. in) 



