'210 PROCKKPIXGS OF TUE MA LA CO LOGICAL SOCIKTT. 



11. Sphcs^rium Andersojiianiini. n.sp. (type). Length 17'.5. breadth 1-5 mm. 



Badlands Hills, 1 mile east of Sand Hollow, Oregon. Pliocene, p. 132. 



12. Comeocyclas Meeki. n.sp. (type, a mould). Length 11, breadth 11 mm. 



Hill near Hawthorne, on Beknont stage road, Nevada. Earlv Eocene. 

 p. 13-5. 



13. Lymncea Cooperi, n.sp. (a) Type, altitude 11, breadth -5 mm. ; (b) cotype. 



altitude 7, breadth 3 mm. ; (c) cotype. altitude 16, breadth 6 mm. 

 Type and small cotype from spring, Wrights, Santa Cruz Mountains. 

 California ; large cotype fi-om Adobe Creek, near Camino Eeal, Santa 

 Cruz Mountains, California, p. 143. 



14. Pomphohjx Sanctteclarce , Hannibal, (a) Type, altitude 5. breadth 8 mm. ; ; 



near Los Gatos limestone quariy, Los Gatos, Santa Cruz Mountains, 

 California. (6) Specimen from Telephone Hills, near McKittrick, 

 California. Pliocene, p. 163. 

 1-5. Zalophanciilus Morani, n.sp. (type). Max. diameter 9, mm. diameter 

 7, altitude 3'.5 mm. Badlands Hills, 1 mile east of Sand HoUow, 

 Oregon. Pliocene, p. 1-52. 



16. Helisoma Cordillerana. n.sp. (type, a mould, viewed from beneath). 



Diameter 22 mm. Hill near Hawthorne, on Belmont stage road, 

 Nevada. Early Eocene, p. 161. 



Plate YH. 



17. ifargaritmia Herrei, n.sp. (type, mould and partial cast in limonite of 



imperfect pair of valves). Length (estimated) 11-5. breadth 40 mm. 

 One-quarter of a mile above Carnegie Pottery plant in cut along 

 Western Pacific Eailway, Corral Hollow, Tesla, Cahfomia. Late 

 Eocene, p. 121. 



18. Unio transpacifica . Am. & Hann., n.sp. (a) Type, length -58, breadth 



30 mm. : {b\ cotype, a shghtly imperfect pair from which the shell 

 matter has been cut away, exposing the impressions of the hinge-teeth . 

 length 70, breadth 36 mm. Bluffs along Olequa Creek at shoals 

 1^ miles above Little Falls, Washington. Late Eocene, p. 123. 



19. Gonidea Hemphilli, n.sp. (type). Length 31, breadth 14 mm. Water 



tunnel, head of Telegraph Canon. Berkeley Hills, California. The 

 specimen is the mould of one valve and a portion of another (not shown 

 in figure) in coarse sandstone. Miocene, p. 128. 



20. (? Sphariiim) Catherina. n.sp. (type). Length -5, breadth 3*8 mm. Hill 



near Hawthorne, on Belmont stage road, Nevada. The specimen is the 

 mould of both valves in marl. Early Eocene, p. 132. 



21. S. Eogersi, n.sp. (type, a limonite cast). Length 20. breadth 14'5 mm. 



One-quarter of a mile above Carnegie Pottery plant in cut along Western 

 Pacific Railwav, Corral Hollow, Tesla, Cahfomia. Late Eocene, 

 p. 131. 



22. Comeocyclas Tremperi, n.sp. (type). Length 1'4, breadth 13, depth of 



valve 1 mm. Bluff Lake Cienaga, San Bernardino Mountain- 

 California, p. 137. The figure is greatly enlarged ; the species is or. 

 of the smallest Comeocyclads. 



Plate Yin. 



23. Pachifchilus Lausoni, n.sp. (type). Length 27, breadth 10 nmi. Near 



BaidPeak. Berkeley Hills, Cahfomia. Miocene, p. 183. 



24. Planorbis Mojaveiisis, n.sp. (type). Diameter 9'o mm. {a) Yiew from 



above ; (6) umbilical view, enlarged somewhat more than (a). Near 

 Barstow, Mojave Desert, California. Miocene, p. 1-57. 



25. Lanx Elamathensis. n.sp. ia) Type. max. diameter 11. min. diameter 7'5, 



altitude 3 mm. ; (6) cotype. max. diameter 16. min. diameter 9"-5, 

 altitude 3'5 mm. Near Government Irrigation Dam, Upper Klamath 

 Lake, Oregon, p. 149. 



