190 



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



Sdbgenus RHODEA, H. & A. Ad. 



Shell thin, dextral, clausiliaform ; last whirl flattened, the 

 base acutely carinated, excavated beneath ; columella arcuated, 

 thickened, subtruncate. 



Coliimna californica, Pfeiffee, — Shell subulate, thin, with 

 very crowded, oblique strise or wrinkles, waxen white ; whirls twelve to 

 thirteen, the upper convex, the last three or four flat, the last 

 fig. 660. exceeding slightly one-sixth the shell's length, sharply cari- 

 nated at base, below the carina somewhat hollowed out ; 

 columella arched, thickened, subtruncated, reaching the 

 base ; aperture somewhat four-sided ; peristome simple, 

 acute. Length 23, diam. 3h mill. ; aperture 4 mill, long, 2| 

 wide. 



Achatina californica, Pfeiffer, Symb. ad. Hist. Hel. Ill, 89 ; 



Mon. Hel. Viv. II, 2ii7.— Reeve, Con. Icon. 115.— W. G. 



BixNEY, Terr. Moll. IV, 26, pi. Ixxix, f. 19.— Bland, 



Ann. N. Y. Lye. VIII, 166, f. 10 (1865). 

 Columna fali/ornica, Chend, Man. de Conch. I, 431, f. 



3172. 



Columna 

 californica 



Monterey, California. I have given 

 a copy of Reeve's figure. 



I doubt this shell really having been 

 found in California. Fig. 331 repre- 

 sents a specimen from Bogota, New Granada, which 

 seems identical with it. Mr. Bland {I. c.) positively 

 asserts that the species should be removed from the 

 American catalogue. 



Fig. 331. 



Fossil Species of Columna. 



Columna? teres, Meek & Hayden, Proc. Acad. Nat. Sci. Philad. 1860,431 

 i=Bul.? teres), Clausilia? M. & H. /. c. 1856, 117. 



Columna? vermiculm (Clausilia?), Meek ^i Hayden, Proc. Acad. Nat. Sci. 

 Philad. 1860, 431 (=BuL? vermiculus), M. & H. /. c. 1856, 118. 



BVL,I]MUS, acopoLi. 



Shell oblong ; aperture longitudinal, margin unequal, peri- 

 stome thickened, generally expanded, columella pliciform. 



