I 



PADOLLUS. 443 



Species of Teinotis. 

 asiuiua, Liiin. stomatellseformis, Reeve. 



Genus padollus, Montfort. 



Shell depressed, ear-shaped; spire small, sub-lateral, 

 surface corrugated or tubercular, with a prominent, spiral 

 ridge in the middle ; aperture very large, pearly within, 

 perforated with a few holes, and with a deep furrow parallel 

 with the series of perforations. 



S//n. Padolla, Oken. Padola, Flem. 



Ex. P. tricostalis, Cliemnitz, pi. 50, fig. 7. 



The chief peculiarity of this genus consists in the groove 

 which runs parallel with the line of perforations in the 

 shell, and which, doubtless, is attended with a correspond- 

 ing peculiarity in the animal ; the species are from Africa 

 and New Holland. 



Species of Padollus. 



clathratus, Reeve. papulatus, Reeve. 



Driugii, Reeve. pulcherrimus, Martyn. 



Emma, Gray. Roei, Gray. 



excavatus, Lam. tricostalis, Chem. 



uffivosus, Martyn. venustus, Adams and Reeve. 

 ovinus, Chem. 



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



Shell with an elevated dorsal ridge, running parallel with the 

 row of perforations ; aperture with a corresponding spiral de- 

 pression ; apex sub-spiral, the spire nearly terminal. 



incisus. Reeve. parvus, Linn. 



Janus, Reeve. reticulatus, Reeve. 



