cylindrella. 21 



Spuriol's Species of Glandina. 



Glandina marmtnii, Desuayes, is referred doubtluUy to North America 

 in Beck's Ind. 7S. 



Spurious Species of Yermivora. 



Testacella . (Hitchcock's Geol. Rep. Mass 1835,27.) It is im- 

 possible to say what is referred to ; certainly not a Testacella, as 

 tliat genus is not found native to North America. 



Testacella haliotoidea. A single specimen found in a greenhouse in Nova 

 Scotia. Probably imported on plants. 



Sect. 2. Phyllovora. The buccal mass small, ovoid, not produced. Jaw 



distinct, horny, except in Cylindrellulte ; teeth on numerous, four- 

 sided plates, close together on the lingual membrane. Mostly 

 herbivorous. 



* Mantle (either discal or spiral) defined, on the middle of the back. Pul- 

 monary cavity under the mantle, and attached to it. Head without any 

 lateral grooves. 



Family CYLINDRELLID^E. 



Lingual membrane very long and narrow ; teeth arranged 

 en chevron, joined two by two at their bases. 



Jaw wanting. 



Body short, stout, spiral, protected by a well-developed 

 shell. Head with a aimple, non-projectile buccal sack. Eyes 

 at the ends of moderate peduncles; tentacles stout, quite 

 small. Mantle thin, covered with a shell capable of con- 

 taining the whole animal; respiratory orifice at the right 

 side beneath the margin of the shell. Foot short, broad, 

 without a distinct locomotive disk, simple posteriorly. Vent 

 near the respiratory orifice. Orifice of the reproductive 

 organs — ? 



Shell spiral, cylindrical, or turreted, white or variegated, 

 outer lip thickened ; aperture circular. 



CYLinrDRELLA, Pfk. 



Shell cylindrical or pupjEforni, multispiral, generally trun- 

 cated; with remarkable differences in the form of the axis, often 

 furnished with revolving larainte or other curious processes; 



