Notes on certain Terrestrial Mollusc a, imth Descriptions 

 qfl^'ESY Species. 



By Thomas Bland. 



{Continued from Vol VIII., p. 170.) 



Reprinted from the Annals of the Lyceum of Natural Ilistoiy in New York, Vol. IX., April, 1868, 



The genus Cylindrella (Pfeiffer, 1810), as generally accept- 

 ed, embraces a great number of species of veiy diverse forms, 

 belonging chie% to the faunas of Mexico and the islands af 

 Cuba, Haiti and Jamaica. With reference to the shell, the ani- 

 mal being little known, the genus lias been placed in Helicidm 

 between Pupa and Clausilia. 



In 1855, Schmidt {Stylommatopliorci) stated that Cylindrella 

 (JJroGoptis) has no jaw, and that the teeth resemble those of 

 Glandina and Daudehccrdia^ but differ in having two teeth on 

 a common base. 



Morcli in 1859 {Mcdalc. Blatt. p. 109) proposed an arrange- 

 ment of the Pidmonata^ the divisions characterized bj the 

 presence and form, or absence of jaw, — one of such divisions 

 being Agnatha^ in which the jaw is wanting. This method of 

 classification was subsequently further elaborated by Morch 

 {Journ. de Conch, v. 1865), who, referring to Schmidt's state- 

 ment, placed Cylindrella in Agnatha. 



Gray {Ann. c& Mag. Ned. Hist. vi. 2GT, 1860) suggested 

 a division of the Pulmonatec Geophila into two sections, viz.: 



Sect. I. Vermivora. Buccal mass very large ; elongate, pro- 

 jectile hke a proboscis. Jaw none ; teeth numerous, slender, coni- 

 cal, distant. Mantle well defined. Subterraneous ; carnivorous, or 

 worm-eatino\ 



Sect. 11. Phyllovora. The buccal mass small, ovoid, not pro- 

 duced. Jaw distinct, horny; teeth numerous, four-sided, close 

 together on the linonial membrane. Herbivorous. 



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