168 BULLETIN OF THE 



Zonites sculptilis. 



Plate III. Fig. 9. 



For the sake of comparison with the preceeding species, I have given other 

 figures here of the true Z. sculptilis. 



Zonites Simpsoni, Pilsbrt. 



Plate I. Fig. 8, 



I give an enlarged figure of an authentic individual of this species. For 

 the description see Third Suppl., p. 218. 



Zonites Diegoensis, Hemphill. 



Plate III. Fig. 2. 



Shell minute, umbilicated, thin, light horn-colored, with delicate incremental 

 striae, globose ; whorls 3|, convex ; base swollen ; suture deep ; umbilicus broad ; 

 aperture narrow, rounded ; peristome tliin, acute, its ends approximated, the inner 

 one sliglitly reflected. Greater diameter 3^ mm., lesser 1^; height If mm. 



Near Julian City, San Diego Co., California. On Cuyamaca Mountain, 4,500 

 feet elevation. 



The above is Hemphill's description. My figure is drawn from an authentic 

 specimen. 



Zonites cuspidatus, Lewis. 



Vol. v., Fig. in text ; Suppl., Plate II. Fig. C. 



Shell imperforate, small, slightly convex above, flattened below ; light horn 

 color, shining; whorls 6, gradually increasing in size, with wrinliles of growth, 

 the last not descending at tlie aperture ; peristome thin, acute ; aperture 

 rounded, bearing within behind the peristome a white callus, on which is 

 one subcentral and a second basal, erect, recurved tooth-like process, sepa- 

 rated by a rounded sinus ; base often blackish, showing the white callus 

 prominently. Greater diameter 8 ram., lesser 6 ; height 4 mm. 



Zonites cerinoiden-t, var. cuspidatus, Lewis, Proc. Phila. Ac. Nat. Sci., 1875, p. 334. 

 Zonites cuspidatus, W. G. Binney, Ann. N. Y. Ac. Nat. Sci., Vol. L p. 359, Plate 

 XV. Fig. C ; Suppl. to Terr. Moll. V., Plate II. Fig. C. 



Mountains of Tennessee and North Carolina: a species of the Cumberland 

 Subregion. 



The tooth-like processes within the aperture, strongly curved towards each 

 other, form an arched space. 



