TO GEOLOGY. Ill 



FAMILY PLICACEA. 



GENUS ACTEON.* Montfort. 

 A. punctatus. Plate 4. Fig. 96. 



Description. Shell ovately conical, transversely and 

 closely furrowed ; furrows closely set with punctures ; sub- 

 stance of the shell rather thick; spire rather elevated, 

 pointed ; suture somewhat impressed ; columella with one 

 fold; whorls five; mouth narrow, about three fifths the length 

 of the shell ; outer lip thickened about the middle. 



Length 7-20ths, Breadth .2, of an inch. 



Observations. This beautiful little species is remarkable 

 for its graceful form and beautifully punctured furrows. It 

 is closely allied to the lineata (herein described). It dif- 

 fers in being less conical, and in having larger punctures. 

 Only one specimen of these in my possession has the thick- 

 ened lip. Of the remainder, one seems young, the other 

 broken. Sowerby's figure of A. JYoce, (Min. Conch, plate 

 374) has a strong resemblance to this species, but does 

 not seem to have the punctured furrows, or thickened out 



HP. 



* Tornatella (Lamarck), 



