HELIX. 



western region beyond the Mississippi, and was found 

 quite abundant at Corpus Christi, in Texas, and at the 

 Washita Springs, in Arkansas. 



REMARKS. The aspect of this shell is quite different 

 from that of any other North American species except 

 If. mobiliana, which is a much smaller shell. Small 

 specimens of If. dausa approach large specimens of this 

 shell somewhat. If. similaris is also allied in its charac- 

 ters. I am inclined to think that H. pacliyloma, Menke, 

 is one of the forms of this variable species. [G.] 



7. HELIX HORTEJVSIS, MtJLLER. 

 PLATE VIII. 



H. testa sub-globosa, imperforata, glabra, lutea, unicolore 

 vel fasciata ; anfractibus quinis, ultimo anfractu ventricoso ; 

 labro albo, sub-reflexo, intus incrassato ; basi convexo. 



SYNONYMS AND REFERENCES. 



Helix hortensis, MULLER, loc. cit. 52, No. 247. 



GOULD, Invertebrata, &c. 172. 

 Helix sub-globosa, BINNEY, Boston Jour. Nat. Hist. I. 485. pi. 17. 



DESCRIPTION. 



ANIMAL. Head and neck blackish, with a slight tinge 

 of brown ; tentacles smoky ; eyes black ; base of foot 

 inky, posterior extremity dirty flesh-color. Foot rather 

 slender, terminating acutely. Respiratory foramen sur- 

 rounded with a blackish circle. Genital orifice indicated 



