112 Proceedings of the Royal Society of Victoria. 



Observations. — This species recalls and apparently has some 

 affinity to some of the forms of the living species, D. crenularis., 

 Lamarck, from North Australia and Singapore, and the form to 

 which it appears most closely related is that rej^resented by 

 Tryon in his Manual of Conchology, pi. x., tig. 69, from this it is 

 separable principally by its narrower and slightly longer canal, 

 more slender columella, fewer costfe, and different details of 

 ornament. 



61. Natica wintlei, T. Woods. 



N. wintlei, T. Woods, P.R.S.Tas., 1875, p. 23, pi. i, tig. 3. 

 N. wintlei, Johnston, Geo. Ta.s., 1888, pi. xxix., tig. 10. 

 N. ivint/ei, Tate, Gast. IV., 1893, pp. 322, 323. 



62. Natica subnoae, Tate. 

 A\ siibnoce, Tate, Gast. IV., 1893, p. 320, pi. vi., tig. 1. 



63. Natica vixumbilicata, T. Woods. 



N. ovata, T. Woods {non Hutton), P.R.S.Tas., 1875, p. 17. 

 N. vixumbilicata, T. Woods, op. cit., 1876, p. 111. 

 N. vixumbilicata, Tate, Gast. IV., 1893, pp. 320, 321, pi. x., 

 tig. 9. 



64. Natica polita, T. Woods. 



N.poHta, T. W^oods, P.R.S.Tas., 1875, p. 23, pi. i., tig. 4.- 

 N. polita {forma typica), Tate, Gast. IV., 1893, p. 325. 

 N. polita, {forma iiiflata), Tate, toe. cit. 



65. Natica, n. sp. 



Observations. — This shell is only represented by one example 

 in the present collection, and appears to be entirely distinct from 

 any of our already recognised species ; Ijut taking into considera- 

 tion the fact that most of our common fossil representatives of 

 this genus are subject to no small amount of variation, I refrain 

 from attaching a specitic name and rearing up a new species upon 

 this single specimen. The form now under examination may be 

 said to show some atiinity to N. tvintlei, T. Woods, from the same 

 beds, and to N. aldingensis, Tate, from the eocene beds of 

 Aldinga, South Australia. 



