STRIGATELLA. 



173 



Species of Volutomitra. 



Adansonii, Kien. 

 capillata, Gould. 

 Chilensis, Gray. 

 cornea, Lam. 

 coruicula, Lam. 

 cornicularis, Lam, 

 ebenus, Lam. 

 Graja, Reeve. 

 Groenlaudica, Gray. 

 lactea, Lam. 

 lutescens, Lam. 



melaleuca, Quoi/. 

 melauiana, Lam. 

 nigra, Quoy. 

 oleacea, Reeve. 

 Quoyii, Desh. 

 Philippiani, Forbes. 

 plumbea. Lam. 

 semen, Reeve, 

 simplex, Dkr. 

 strigata, Swains. 

 tigriua, A. Adams. 



Genus STRIGATELLA, Swainson. 



Shell ovate or fusiform, solid ; spire acuminate, whorls 

 smooth or transversely striated, usually covered with an 

 epidermis ; aperture narrow ; columella transversely pli- 

 cate ; inner lip with a callosity at the hind part ; outer 

 lip usually thickened in the middle, and internally grooved 

 or dentate. 



Ex. S. Woldemarii, Kietier, pi. 19, fig. 3. Shell, S. 

 Ziervogeliana, Chemnitz, fig. 3, a. 



The species of this genus are remarkable for their Co- 

 lumbelliform appearance, and are usually found under 

 stones at low water, sometimes also in the crevices of 

 rocks, and on the borders of shallow pools left by the 

 retiring tide. In the typical species the whorls are 

 usually striped and covered with a thick epidermis ; in 

 the sub-genus Mitreola, founded by Swainson on a fossil 

 species, but which appears to us to include many recent 

 forms, the apex is more acuminated, and the whorls are 



