Order OPISTHOBRANCHIATA. 



Family ACTiEOMD^. 



Genus ACTION, Montfort. 



[Conch. Syst. t. ii. 1810, p. 315.] 



"Tornatelle," Lamarck, Cours Zool. 1812, p. 117. 



Tornatella, Lamarck, Hist. Nat. Anim. sans Vert. t. vi. pt. 2, 



1822, p. 219. 

 Speo, Risso, Hist. Nat. Eur. Merid. t. iv. 1826, p. 235. 

 Myosota, Gray, Proc. Zool. Soc. Lond. 1847, p. 160. 



Characterized by a not very prominent protoconch with sinistral 

 nucleus; thick columella with one strong spiral, slightly oblique 

 plication. 



Type. — Valuta tornatilis, Linn. 



Actaeon scrobiculatus, Tenison-Woods. 



[Plate I. Figs, la-c] 



1877. Actceon scrobiculatus, Temson-Woods, Pap. Roy. Soc. Tas. 1876, 



p. 102. 

 1889. Tornatella scrohiculata, Dennant, Trans. Eoy. Soc. South Aust. 



vol. xi. p. 48. 

 1893. Tornatella scrohiculata, Tate and Dennant, Trans. Roy. Soc. South 



Aust. vol. xvii. p. 223. 



This species is described as follows by Mr. Tenison- Woods : — 

 " Shell oblong, ovate, solid, apex acute, smooth only at the 

 extreme summit; whorls seven, cancellate with very distinct 

 spiral liraj, much finer longitudinal striae ; interstices rounded or 

 punctate, lii-aj on the last whorl broad and subdivided by a fine 

 groove, longitudinal striae subdistant (so that the interstices are 

 transversely oblong) and passing occasionally over the lirse, so as 

 to make them subgranular, especially at the anterior margin ; 

 aperture subauriform, posteriorly acutely attenuate ; peristome 

 anteriorly everted and recurved, plait conspicuous, solid, obtuse." 



The species is compared with A. pinguis, D'Orbigny, of the 

 European iliocene, from which it may be distinguished in being 

 narrower, and in the disposition of the columellar plication. The 



