REPORT OF THE DIRECTOR 1904 



133 



Pachydon cuneatus Conrad 



14 type Pachydon cuneatus Conrad. American journal 



of conchology. 187 1. 6:197, pl.io, fig. 12a, b (2 speci- 

 mens). 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr Hauxwell, coll. 



Pachydon erectus Conrad 



15 type Pachydon erectum Conrad. American journal 



of conchology. 1871. 6:197, pi. 10, fig. 16. 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr Hauxwell, coll. 



Pachydon obliquus Gabb 



16 hypotype Pachydon obliquus Gabb. American 



journal of conchology. 1868. 4:199. 



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

 pi. 10, fig. 15. 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr Hauxwell, coll. 



Pachydon ovatus Conrad 



1 7 type Pachydon ovatus Conrad. American journal 



of conchology. 1871. 6:197, pi. 10, fig. 4. 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr Hauxwell, coll. 



18 type Conrad. American journal of conchology. 187 1. 6:197, 



type of description. 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr Hauxwell, coll. 



Pachydon tenuis Gabb 



19 hypotype Pachydon tenua Gabb. American journal of 



conchology. 1868. 4:199. 



Pachydon tenuis Conrad. American journal of 

 conchology. 1871. 6:196, pi. 10, fig.ia, b. 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr Hauxwell, coll. 



Bivalve allied to Mulleria 



20 type Bivalve allied to Mulleria Conrad. American 



journal of conchology. 187 1. 6:192 (mentioned; 2 speci- 

 mens) . 



Tertiary (Pebas group) Pichua, Upper Amazon 



Mr. Hauxwell, coll. 



