PLACOSTYLUS. 153 



E.v. T. clausuSj Spix, pi. 75, fig. 4. 



Tomigerus resembles a depressed Odontostomus ; the 

 shells also remind one of Pythia and Anostoma. The 

 species inhabit the province of Bahia in Brazil, and axe 

 doubtless only a modification of the Odontostomi, which 

 come from a similar locality. 



Species of Tomigerus. 



clausus, Spix. gibberulus, Burrow. 



Cimiingi, Neu-c. turbinatus, Pfeiff. 



dentatus, Wood. 



Genus PLACOSTYLUS, Beck. 



Shell imperforate, oblong-conic, rugosely striated, last 

 whorl a little shorter than the spire ; aperture oblong-oval 

 or irregular ; columella tortuous, arcuately plicate ; peristome 

 thick, reflexly expanded, the margins united by a shining 

 tuberculated callus, the columellar dilated, appressed. 



Ex. P. fibratus, Martyn, pi. 75, fig. 5. 



The species of this group inhabit the Australian islands, 

 New Caledonia, and New Holland. 



Species of Placostylus. 



ascendens, Pfeiff. fuligineus, Pfeiff. 



auris-bovina, Chem. porphyrostoraus, Pfeiff. 



Caledonicus, Petit. Shongi, Less. 



fibratus, Martyn. 



