ACTyEONINA. 469 



{Tornatellsea) , but witli no proved columellar plication. This group includes such 

 forms as Auricula Sedgvici and Tornatella jniUa, which I have hitherto classed with 

 the Actseons, as indeed have most authors, though Tate referred Tornatella jpulla, 

 K. and D,, to Adseonina. 



2. Adasoninas with fine spiral lines {Striadxonina in part) such as Adxonina 

 Sarthacensis, d'Orbigny. Possibly also Adseonina hameralis, Phillips, which has a 

 strongly impressed line on the shoulder, might come in here.^ 



3. Adaeoninse which are perfectly glabrous, or only exhibit striation, more or 

 less faint, towards the anterior extremity. This division would include, amongst 

 others, Adseonina as limited, and the sections Ovadseonina, Cylindrohullina, and 

 Trochadseonina. 



414. AcTiEON vel Act^onina Sedgvici, Phillqys, 1829. Plate XLII, fig. 15. 



1829-35. AuEicuLA Sedgtici, Fhillips. Geol. Yorks, part 1, pi. xi, fig. 33. 



1850. AcTiEON Sedgvici, d'Orbigny. Prod., i, p. 263. 



1851. — — Phillips. Morris and Ljcett, Grt. Ool. Moll., part i, 



p. 118, pi. XV, fig. 9. 

 1885. _ _ _ Hudleston, Geol. Mag., 1885, p. 252, pi. v, 



fig. 4. 



Bibliography, Sf-c. — Owing to imperfect preservation it is still doubtful whether 

 Phillips' species is an Adseon or a striated Adseonina. " In the few cases where 

 the aperture has been visible it is invariably without plication " (Hudleston, 

 loc. dt.). Brauns (' Mittlere Jura,' p. 194) considered Tornatella pulla, K. and D., 

 the same as Adseon puUus, Morris and Lycett, but different to Auricula Sedgvid, 

 Phillips. 



Description. — From 5 to 10 mm. in height and considerably more than half as 

 wide as high. Ovate, with a stumpy spire composed of about three whorls. The 

 whorls are strongly tabulate. The body-whorl and penult are ornamented by 

 deeply-cut spiral striae, which are but slightly punctate ; the surface of the 

 body-whorl is thus divided into a number of strap-like belts, of which two, 

 situated slightly below the middle, are wider than the rest. Other indications 

 wanting. 



Relations and Distribution. — A stumpy form almost peculiar to the Dogger, 



^ Stoliczka remarked that the " surface of many Actseoninee a2)pears to be perfectly smooth, but 

 it is more likely this is only in consequence of the uppermost punctated layer of the shell having 

 been removed " (' Cretaceous Gastropoda of Southern India,' p. 399). 



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