318 TURBONILLTD^. 



retrorse ; columella without fold or tooth. T. Jeffreysiana, 

 Seguenza. 



Section Pyrgisgulus, Monts., 1884. 



Whorls scalariform, lamellarly ribbed, peculiarly- spirally 

 sculptured ; aperture tetragonal, no columellar tooth. T. SCA- 

 LARIS, Phil. 



Section PyrgolidiUxM, Monts., 1884. 



Rather stout, with one or more intercostal nodes in the centre 

 of each whorl ; no columellar fold ; apex inclined, to the right. 

 T. ROSEA, Monts. 



Section Pyrgostelts, Monts., 1884. 



With longitudinal ribs, crossed by spiral striae, forming pit- 

 tings ; color fulvous or banded ; columella with a re-entering 

 fold. T. RUFA, Phil. 



Section Pyrgostylus, Monts., 1884. 



Shell varicose, the columella dentate. T. striatula, Linn. 



Subgenus Dunkeria, Carpenter, 1857. 



Whorls rounded, cancellated. T. pauciltrata, Carp. 

 Section Cingulina, A. Adams, 1860. 



Shell turriculated, subulate; whorls numerous, spirally ribbed, 

 the interstices striate, aperture oblong, entire in front, columella 

 straight, simple, lip sharp, arcuate. C. circinata, A. Ad. ; 

 Salaasia, de Folin, 1870, is a synonym. 



Genus LIA, de Folin, 1872. 



Shell oval conic, spire whorls decussated, lip undulated b}- the 

 spiral sculpture — which appears on the colamella, simulating 

 two plications. L, decorata, Folin. 



A doubtful group, possibly described from a young specimen. 



Genus MURCHISONIELLA, Morch, 1875. 



Shell small, elongate, thin, pellucid, man3^-whorled, the apex 

 heterostrophe ; lip profoundly sinuous ; whorls subangular on 

 the periphery, and having two spiral lines which define a sort 



