404 LI0T1IN.E. 



Shell more or less discoidal, white, transversely sulcate 

 or cancellated ; aperture orbicular, scarcely pearly within. 



Genus LIOTIA, Gray. 



Shell turbinate, globose, or discoidal ; whorls longitudi- 

 nally ribbed or cancellated ; axis perforated, umbilicus 

 usually wide and deep ; aperture circular, pearly within, 

 peristome thickened, with a regular, marginal callus. 



Ex. L. Peronii, Kiener, pi. 45, fig. 5. Operculum, 

 L. Peronii, fig. 5, a, 5, b. Shell, L. scalarioides, Reeve, 

 fig. 5, c. 



The species of this genus are never spiny or laciniated, 

 like those of Angaria, with which they have been con- 

 founded, and there is an expanded border round the aper- 

 ture. Many fossil species occur in the Eocene formation 

 of Britain and France ; the recent species inhabit the 

 Cape, the Philippines, and Australia. 



Species of Liotia. 



adamautiua, Duclos. Kieneri, Phil. 



affiuis, A. Adams. nodulosa, A. Adams. 



australis, Kien. Peronii, Kien. 



cancellata, Oray. pulcherrima, A. Adams. 



cidaris, Eeeve. scalarioides, Reeve. 



claLhrata, Reeve. siderea, Reeve. 



crcnata, Kien. tuberculosa, DVrh. 



depressa, Reeve. varicosa, Reeve. 

 discoidea, Reeve. 



Sub-gen. arene, H. and A. Adams. 

 Shell nidiatuly painted with red ; whorls muricated, the last 



