nSSURELLA.— Plate XVI. 



F. mhmta of Lamarck, but have not have been aljle to 

 identity that species. 



Species 122. (Mus. Cuming.) 

 FissuEELLA TEGULA. Fiss. tedd coidco-omtd, crasdus- 

 cula, antice inclinatd, Icevigatd, Uneis impressk radi- 

 untibus obscure decussatd, orificio oUongo, lateribus 

 mbexcavatk ; nigricmte-canled, viitis augustis satura- 

 tioribus radiatd. 



The slate Fissurella. Shell conically ovate, rather 

 thick, inclined anteriorly, smooth, obscurely decus- 

 sated with impressed radiating lines, orifice oblong, 

 slightly excavated at the sides ; blackish-blue, rayed 

 with narrow fillets of a darker tint. 



Hab. ? 



A peculiar slate-coloured species of an elevated conical 



form, with little indication of sculpture. 



