282 PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 



(base : San Julian. 



23. Pyrula Carolina. T , , 



[top: Lake Pueyrredon. 



(base : San Julian. 



24. Siphonaha noachma. ~. ~ . T i r> 



(top: Sierra Oveja ; Lake Pueyrredon. 



f base : San Julian ; Lake Pueyrredon. 



25. Troplion patatromcus. ~. ,,, ,. T , 



[ top : Rio Ghana ; Lake Pueyrredon. 



f base : San Julian. 



20. Volnta granhor. T ,. , .. 



( top : Rio Chaha. 



(base: San Julian ; Lake Pueyrredon. 



27. Balamis vanatis. . _, .. , .. 



(top: Rio Chalia ; Shell Gap. 



("base: San Julian; Santa Cruz. 



28. Gery on peruvianus. 



[ top : Lake Pueyrredon. 



We add the following species, which are either given as Suprapata- 

 gonian by v. Ihering, Cossmann or Ameghino, but found in our collec- 

 tion only near the base, or are given as Juliense by Ameghino or 

 Patagonian by v. Ihering, but found in our collection at the top. 



Suprapatagonian species, found at the base : 



29. Crassatellites longior, Lake Pueyrredon, base. 



30. Amathusia angulata, Santa Cruz, at water's edge. 



3 1 . Urosalpinx pyriformis, Lake Pueyrredon, base. 



Patagonian species, found at the top : 



32. Mytilus cf. chorus, Rio Chalia. 



33. Tellina tehuelcJta, Shell Gap. 



34. Psammobia patagonica. Rio Chalia. 



35. Martesia patagonica, Shell Gap, Lake Pueyrredon. 



36. Valuta dorbignyana, Rio Chalia. 



Finally, I give here the species which are recorded by v. Ihering as 

 Patagonian and Suprapatagonian. 



37. Niicula patagonica. 43. Crcpidula gregaria. 



38. Limopsis insolita. 44. Natica secunda. 



39. Cardita incequalis. 45. Natica consimilis. 



40. Cardita patagonica. 46. Turritella breantiana. 



41. Venus mcridionalis. 47. Cancellaria gracilis. 



42. Infundibulum clypcolum. 



Of these 47 species, for which a distribution from top to bottom of the 

 series is very probable, the following belong to Ameghino's or v. Ihering's 

 characteristic fossils of their different subdivisions. 



