18 



AMNICOLA LAPIDARIA, Say. 



PLATE 1. FIG. 10. 



A. testa elongata, ochraceo-brunnea, perforata; apertura 

 ovata, subangulata; labio subarcuato, in anfractum ultimum 

 posito. Long. 6 mm. 



SYNONYMS AND REFERENCES. 

 P. LAPIDARIA, SAY. Nich. Encyc. 3d Am. ed. No. 2. 



DESCRIPTION. 



ANIMAL "not so long as the shell, pale; head 

 elongated into a rostrum as long as the tenta- 

 cula, and emarginate at tip; tentacula 2 filiform, 

 acuminated at tip, short; eyes prominent, situ- 

 ated at the external or posterior base of the 

 tentacula; base or foot of the animal dilated, 

 oval, obtuse before and behind." 



SHELL "turreted, subumbilicate, with 6 volu- 

 tions which are obsoletely wrinkled across; 

 suture impressed; aperture longitudinal ovate 

 orbicular, operculated, rather more than one- 

 third the length of the shell. Length about J 

 inch." 



