194 Binney on Terrestrial Molhisks. 



I adhere to the opinion expressed in vol. i. that Hel. 

 rubella Green is identical with Hel. occulta, and not with 

 this species. PfeitTer follows the opinion of Gould. 



The most northern locality at which this species has 

 been found is Tennessee. 



Helicina orhiculata Sowerby (Thes. Conch.) is not this 

 species. Pfeitler refers it to Hel. nitida, a Cuban shell. 



Helicina vestita Guilding, in Sowerby's Thesaurus, No. 

 71, p. 14, tab. 1, fig. 42, appears to be the young of this 

 species. Its description is copied by Pfeitfcr, who was 

 unacquainted with the shell (Mon. Pneum. i. 353). It is 

 given below, while the figure is copied on my pi. 75, 

 fig. 19. 



H. VESTITA. T. globosa, tenui, concentrice lyrata, parva ; apertura 

 semi-lunarl ; labio cxterno tenui. Globose, thin, concentrically ribbed, 

 small ; aperture semi-lunar, outer lip thin. North America. 



Helicina castanea Sowerby (1. c.) may also be an imma- 

 ture specimen of orhiculata. The figure of Sowerby is 

 copied on pi. 75, fig. 20, and his description given below. 

 Pfciffer refers it to a variety of Hel. subfusca Menke (Mon. 

 Pneum. i. 355). 



H. Castanea. Guilding ? T. H. orbiculatce simili, sed lajvi, depressa 

 labio cxterno tenui. 



Like //. orhiculata, but smooth ami depressed, outer lip thin. North 

 America. 



Sowerby's figure of Hel. mimita is given pi. 75, fig. 18. 



HELICINA TROPICA Iahn. 



Plati: LXXIII. Middle fig. of lower line. 



T. globosa, solida, hovigata, alba; spira fornicata, subacuminata ; 

 anfr. 5 convexiusculi, ultimus tumidus, antiee non descendens ; aprrtura 

 fere verticalis, subsemicircularis, nuilto altior (piam lata; columella 

 brevis, basi tuberculata, retrorsum in oallum basalem ditrusum, concolo- 

 rem, antrorsum in peristoma crassum, rcflexum, interdum dupHcatim 

 continuata. Ojjere. ? Diam. maj. 8, min. 7, alt. 6J mill. (rtV.) 



