94 LAND AND FRESH-WATER SHELLS OF N. A. [PART II. 



Physa troostiana, Lea, Tr. Am. Phil. Soc. IX, 7 ; Obs. IV, 7 (1S44) ; Proc. 

 II, 32(1841). 



Fig. 159 is drawn from the original specimen. 



Cat. No. No. of Sp. 



92titJ 15 



Locality. ' From whom received. | Remarks. 



Teste Lea. 



Pliysa triticea, Lea. — Shell subfusiform, pellucid, polished, red- 

 disli-che.stnut ; spire short, subacute ; sutures sub-impressed ; 

 Fig. 160. whirls four, sub-constricted ; aperture elongate, with a line 

 ja^ within. 



/\i/|) Shasta County, California : Dr. Trask. (Zea.) 



^ Physa tritlceu, Lea, Proc. Acad. Nat. Sc. Phila. VIII, 80 (1850). 



Physa ]yjj. Lea's description is given above. My figure is 



drawn from a shell collected by Dr. Cooper, and de- 

 termined by Mr. Lea, now in the Smithsonian collection. 



Cat. No. 



9268 



No.ofSp. Locality. 



From whom received. Remarks. 



California. Judge Cooper. 



One figured. Type. 



Pliysa concolor, Haldejian. — Shell oval, spire produced, with 

 the apex pointed ; aperture oval, narrow, with the columella 

 Fig. 161. fold distinct. Color honey yellow. 



Characterized by a single specimen brought from Oregon by 

 Mr. Nuttall. (Haldeman.} 



Phtisa concolor, Haldeman, Mon. pt. Ill, p. 3, cover (1841) ; 

 rhysa ^ X- ! i- ) \ / 1 



concolor V- 30, pi. ii, f. 10 (1843).-DkKat, N. Y. Moll. 81 



(1843). 



I have seen no specimens of this species. Fig. IGl is a copy 

 of that of Haldeman. 



Subgenus PHYSELLA, Hald. 



Shell globose, spire short ; aperture elongate, very wide ; colu- 

 mella with the fold well marked. 



Pliysa glol>osa, Haldesiax. — Shell globose, translucent ; spire very 

 short and rounded ; aperture very long aud wide, occupying considerably 



