Dentition of Pulmonala. 45 



Plate IV. 

 Fig. 



A. Lingual dentition of Orthalicus gallina-sultana, Chemn. 



B. A marginal tooth of the same in profile. 



C. The same. The eighth from the median line. 



D. The same. Extreme marginal teeth. 



E. The same. Jaw. 



F. The same. Genitalia. 



G. Liguus virgineus, Lin. The genitalia. 



Plate V. 



Fig. Genitalia and Dentition of 



I. Zonites inornatus, Say. 

 IT. Zonites friabilis. 



III. Helix Troostiana, Lea. 



IV. Helix clausa, Say. 



V. Helix rufo-apicata, Poey. 

 VI. Dentition of III. 

 VII. Helix Pennsylvanica, Green. 

 VIII. Helix nuxdenticulata, Chemn. 

 IX. Helix Josephinae, Fer. 

 X. Geomalacus maculosus, Allm. 



Plate VI. 

 Fig. 



I. Helix Clarlci Lea. Lingual dentition, a, central and lateral tooth; b, marginal 



tooth. See also fig. y for extreme marginals. 

 II. Helix Stearnsiana. Gabb. Genitalia. 



III. Orthalicus obductu*, Shuttl. Lingual dentition; a, central and lateral teeth; b, 



the seventh tooth : c, extreme marginal teeth. 



IV. Helix Traski, Lea. A portion of the genital system, showing vaginal prostate. 



V. See I. 



VI. Same as I. Genitalia. 



VII. Helix Wetherbyi; Bland. Lingual dentition; a, central and lateral teeth b, first 

 marginal teeth : c, extreme marginal teeth. 



Note on the Jaw of Partula. 



Having lately received through the kindness of Dr. W. 

 D. Hartmann a number of Partula preserved in alcohol, I 

 am preparing a description of their lingual dentition, geni- 

 talia and jaw. The latter is the most important point to be 

 studied, this organ never having been described, I now, 

 therefore, give the following particulars : 



In P. fusca, Pease, umbilicata, Pease and virginea, Pease, it is very thin 

 and transparent; arcuate with attenuated ends; cutting margin with a 

 broad very slight median prominence; anterior surface with numerous 

 (over 60 in virginea) very delicate, separated ribs, slightly denticulating 



