100 DESCRIPTION OF NEW 



termination yellow. I name it after Mr Townsend, who accompanied 

 Professor Nuttall in his travels to the Pacific. 



Helix Nickliniana. Plate XXIII. fig. 84. 



Testd subglobosd, tenuicula, albida, longitudinaliter striata, nuhild, perforata, unifascia- 

 ta ; anfractibus quinis ; aperturd rotundatd ; labro subrejiexo ; columella lo&vi. 



Shell subglobose, rather ihin, whitish, longitudinally striate, clouded, perforate, sin- 

 gle banded ; whorls five ; aperture round ; lip slightly reflected ; columella smooth. 



Hab. St Diego, Upper Calefornia. Professor Nuttall. 



My Cabinet. 



Cabinet of Professor Nuttall. 



Diam. -9, Length -7 of an inch. 



Remarks — This species resembles H. Caleforniensis (herein de- 

 scribed), but differs in being less globose and in having no broad light 

 band, as well as in being larger. The whole shell, except the apex, 

 is mottled, the inferior part of the whorls being lighter. In the spe- 

 cimens before me the umbilicus is very nearly closed. 



Helix Oregonensis. Plate XXIII. fig. 85. 



Testa subcarinatd, tenui, lavi, rufo-fuscd, ad carinam bifasciatd, supemh subconvexd, in- 

 femh subinjlatd. 



Shell subcarinate, thin, smooth, reddish brown, double banded on (he carina, above 

 sUghtly convex, below somewhat inflated. 



Hab. Wahlamat, near its junction with the Columbia River. Pro- 

 fessor Nuttall. 



My Cabinet. 



Cabinet of Professor Nuttall. 



Diam. "6, Length -4 of an inch. 



