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NEW YORK STATE MUSEUM 



Isaea ortoni Gabb (sp.) 

 hypotype Mesalia ortoni Gabb. American journal of 

 conchology. 1868. 4:198. 



Isaea ortoni Conrad. American journal of con- 

 chology. 1871. v.6, pi. 10, fig. 10. 



Tertiary (Pebas group) Piehua, Upper Amazon 



Mr Hauxwell, coll. 



hypotype Conrad. American journal of conchology. 187 1. 

 v.6, pi. 10, fig. 13. 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr Hauxwell, coll. 



liris Conrad 

 Liris laqueata Conrad 

 type Liris laqueata Conrad. American journal of 

 conchology. 1871. 6:194, pi. 10, fig. 3. 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr Hauxwell, coll. 



neritina Lamarck 

 Neritina ortoni Conrad 

 type Neritina pupa Gabb. American journal of con- 

 chology. 1868. 4:197. 



Neritina ortoni Conrad. American journal of 

 conchology. 1871. v.6, pi. 10, fig. 5. 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr Hauxwell, coll. 



type Conrad. American journal of conchology. 187 1. v.6, 

 pi. 10, fig.n. 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr Hauxwell, coll. 



pachydon Gabb 

 Pachydon altus Conrad 

 type Pachydon altus Conrad. American journal of 

 conchology. 1871. 6:197, pi. 11, fig.ia, b. 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr Hauxwell, coll. 



Pachydon carina tus Conrad 

 type Pachydon carinatus Conrad. American journal 

 of conchology. 1871 6:196, pi. 10, fig. 7. 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr Hauxwell, coll. 



