87 



ACTEON crenatus. 



TAB. CCCCLX.— /^. 1. 



Spec. Char. Ovate, elongated, transversely 

 striated, columella minutely crenated. 



A. SLIGHTLY \entricose, rather pointed, and elongated 

 shell ; the aperture is very narrow above, the outer lip 

 sharp, the columella without a plait but neatly crenated, 

 which is a very remarkable circumstance. 

 Found in the London Clay of Barton Cliff. 



ACTEON striatus. 



TAB. CCCCLX.— ^^. 2. 



Spec Char. Ovate, acute, transversely striated, 

 columella without a plait; striae not punc- 

 tated. 



V ERY regularly ovate with a pointed spire ; the striae 

 are most conspicuous about the base, upon the middle 

 they are nearly lost ; they are in no part divided into 

 punctums ; the columella is strong, but does not appear 

 to have any real plait upon it, nor has it a sulcus, but is 

 simply spiral • the aperture is ovate, pointed above, and 

 occupies more than half the length of the shell. 



Strongly resembling Auricula sulcata of Lamarck, 

 (which according to his own principles, he ought to have 

 removed to his genus Tornatella, Acteon of Montfort) 

 but smoother and more ventricose ; its columella also 

 differs ; Tornatella ventricosa of De France's MSS. is, 

 I believe, also different, although nearly akin to it. 

 A Crag fossil, in the Cabinet of Mrs. Cobbold, 



