174 HELICID^. 



35. HELIX SAXICOLA, PFEIFFER. 



Plate XXIX. a. Figure 4. 



H. testa depresso-conica, tenui, brunnea, oblique striata, 

 umbilicata ; anfractibus quatuor cum dimidio arete spiratis ; 

 labro acuto, tenui; apertura orbiculari, campanulata. 



SYNONYMS AND EEFERENCES. 



Hdix aaxicola, Pfeiffee, Wiegm. Archiv. 1840, 1. 251. 



Monog. Hclic. Viv. I. 87. 

 Helix mauriniana, D'Oeb. iu Sagra's Cuba, I. 162, t. S, f. 20-23. 



DESCRIPTION. 



Shell minute, planorboid, smooth, horn-colored ; 

 spire slightly elevated, composed of four or five ■well- 

 rounded whorls separated by a deeply impressed suture ; 

 beneath, with a broad, umbilical pit, one-third the dia- 

 meter of the shell, exhibiting all the whorls within. 

 Aperture circular, being but slightly impinged upon by 

 the penult whorl, across which passes a slightly ap- 

 pressed scale of enamel, rendering the hp continuous; 

 lip slightly reflexed, so as to render the aperture some- 

 what campanulate. 



Diameter about one-eighth of an inch ; height about 

 half as much. 



Geogkaphical Distribution. Found at Galveston, 

 Texas, by Mr. Bartlett, but was probably introduced 

 from Cuba, where it appears to be not uncommon. 



Remarks. This shell might at first be taken for a 



