A. Smith Woodward — On the Genus Notidanus. 255 



17. N. Loozi, Vincent. 



1876. N. Loozi, G. Vincent, Ann. Soc. Malacol. Belgique, vol. xi. p. 126, pi. vi. fig. 5. 



I am indebted to Mr. G. F. Harris for the reference to M. Vincent's 

 description of a fragmentary tooth of Notidanus under the specific 

 name of N. Loozi. The specimen in question was obtained from the 

 Lower Landenien (Thanet Sand) of Belgium, and exhibits nothing 

 beyond the anterior portion of the crown : it indicates a species 

 about the size of N. primigenius, and it is distinguished from the 

 tooth of this well-known form by the peculiar shape of the cones, 

 and the very large denticulations in front. Notwithstanding its im- 

 perfect character, the type-specimen appears to justify the author's 

 conclusions. 



18. N. Targionii, Lawley. 



1877. -ZV". Targionii, E. Lawley, Atti Soc. Toscana Sci. Nat. p. 71, pi. ii. fig. 3. 



A small species founded upon lower teeth from the Pliocene of 

 Tuscany. The type specimens are evidently very similar to the 

 mandibular teeth described above as immature examples of JV. 

 serratissimus. 



19. N. gigas, Sismonda. 



1857. N. gigas, E. Sismonda, Mem. E. Accad. Sci. Torino, ser. 2, vol. xix. p. 460, 



fig. 13. 

 1877. ,, ,, E. Lawley, Atti Soc. Toscana Sci. Nat. p. 68, pi. i. fig. 6. 



A species allied to N. primigenius, but with the lower teeth re- 

 latively longer, the cones less regular, and the anterior serrations 

 of the crown more pronounced. Occurs in the Miocene of Mondovi, 

 Piedmont, and the Pliocene of Volterrano, Tuscany. 



It is interesting to be able to add that teeth undoubtedly referable 

 to this species have also been obtained from the Pliocene of Britain. 

 Through the kindness of Mr. Reed, the Hon. Curator in Geology, 

 and Mr. Noble, the Hon. Secretary, of the York Museum, I have 

 had the opportunity of examining the beautiful series of Crag Noti- 

 danidas in the Eeed Collection of that institution, and among these 

 there is a very perfect crown of JV. gigas, shown in the accompany- 

 ing woodcut (Fig. 1). The specimen has been considerably rolled 



Fig. 1. — Tooth of Notidanus gigas, Sismonda. Eed Crag, Suffolk. 

 [Eeed Coll., York Museum.] 



and abraded, so that the anterior serrations are scarcely visible, and 

 the root is wanting, but it is otherwise a most typical example. An 

 upper side tooth in the same collection may also perhaps be asso- 

 ciated with this form. 



20. N. Meneghinii, Lawley. 

 1877. iV. Meneghinii, E. Lawley, Atti Soc. Toscana Sci. Nat. p. 72, pi. ii. fig. 4. 

 Some large mandibular teeth from the Pliocene of Volterrano, 

 Tuscany, have been described by Lawley under this specific name. 



