haxnibal: califoeniax fkeshwatp:u moi-lusca. 211 



26. Pachychilus Drakei, Am. & Harm., n.sp. (type). Altitude 45, breadth 



14 mm. Bluffs along Olequa Creek at bend below Little Falls, 

 Washington. Late Eocene, p. 183. 



27. Ambloxiis Oleqimejisis, Am. & Ka-im., n.sp. (type). Altitude (estimated) 



.32, breadth 9'5 mm. Bluffs along Olequa Creek above shoals 2 nules 

 north of Little Falls, Washington. Late Eocene, p. 178. 



28. Brannerillus physisjnra, n.sp. (type). Altitude 2'6, breadth .3'3 mm. 



Marl ' reefs ' near mouth of gulch, south of Medallion One Canon, 

 Kettleman Hills, near Coalinga, California. Pliocene, p. 191. 



29. Pyrgidopsis WiUiamsi, n.sp. (a) Type, altitude 8".5, breadth 7 mm.; 



(b) cotype, altitude 7, breadth 6'3 mm. ; (c) cotype, altitude 8'7, breadth 

 7 mm. Martin & Dudley's oil-well, Lost HlUs, San .Joaquin YaUey, 

 California. Pliocene, p. 189. 

 '60. Flumviicola Modoci, n.sp. (type). Altitude (estimated) -5, breadth 3'2 mm. 

 Fletcher's Spring, south end of Goose Lake, California, p. 187. 



31. Vivipariis Turneri, n.sp. (type, a mould in quartzite). Altitude 32, breadth 



26 mm. Near coal-mine, Silver Peak Range, Nevada. Early Eocene, 

 p. 193. 



32. V. Wasliingtonmnus, Am. <t Hann., n.sp. (type). Altitude 20, breadth 



1-5 mm. Bluffs along Olequa Creek above shoals, 2 miles north of Little 

 Falls, Washington. Late Eocene, p. 194. 



33. Lioplax Andersoniana, n.sp. (type, a limonite cast). Altitude 21, breadth 



11 mm. Cut along Western Pacific Eailway, one-quarter of a mile 

 above Carnegie Pottery plant, Corral Hollow, Tesla, California. Late 

 Eocene, p. 196. 



34. Helisoma Cordillei-ana, n.sp. (tvpe, viewed from above). See pi. vi, fig. 16. 



p. 161. 



35. FisJierola lancides, n.sp. (a) Type, max. diameter 6, min. diameter 3'8, 



altitude l'2mm., viewed from above: (6) cotype, max. diameter 5 '5, 

 min. diameter 4, altitude 1'2 mm., viewed from beneath. Snake Eiver, 

 Washington, p. 152. 



Footnote to p. 197. 



Since the first portion of this paper was written additional studies have 

 shown that the fauna of the Columbia System is not homogeneous. That 

 inhabiting the Columbia basin above the Dalles, characterized by Sph-ceriunt 

 comeum and teniie, Coriieocyclas Idahoensis, Lynuuea. aiiricularia and 

 stagnalis, Lanx KuttaUi, Fisherola lancides, Platwrbis exacutiis, Pomplwlyx 

 t-^usa, Physa hypnorum (probably), Fluminicola Colunibiajui suad 7uinutissima, 

 > more closely allied to the faunas of the other systems flanking the Eocky 

 Mountains, while the fauna of the lower Columbia Eiver and coast streams, 

 peculiarized by Lanx subrotundatris and Fluminicola virens, groups better with 

 the coastal systems. 



The name Columbia System originally covered all territory north to Southern 

 Alaska, but has been so restricted and warped as to have assumed an entirely 

 different meaning, and for either of these di^"isions is hardly appropriate, so 

 may be abandoned. The upper Columbia basin, known locally as the ' Inland 

 Empire Country '. may take the name Inland Empire System, and the coastal 

 district the name Willamette Systeju. 



