78 SUPPLEMENT TO THE CRAG MOLLUSCA. 



references ; the shell more resembling Nat. heros, Say, to which Mr. Jeffreys refers it. I 

 believe however that it is distinct, as that shell has a deeper suture. I have found some 

 imperfect specimens in the Cor. Crag of Sutton which may possibly belong to catenoides 

 but more probably to N helicina, Broc. N. catenoides is given also by Mr. Bell from Easton 

 Cliff, (' Ann. and Mag. Nat. Hist./ September, 1870) but I have not seen the specimen. 



Natica Montacuti, Forbes. Supplement, Tab. IV, fig. 10. 



Natica Montacuti, Fori. Malac. Monen., p. 32, pi. ii, figs. 3, 4. 



Locality. Upper Glacial, Bridlington. 



My figure represents a specimen in the British Museum, among the Bridlington 

 Eossils, to which the above name is attached, and this I think may be fairly referred as 

 above. This name is introduced by the late Dr. S. P. Woodward in his list of Brid- 

 lington Shells, ' Geol. Mag.,' vol. i, p. 53. 



Natica helicoides, Johnston. Crag Moll., vol. i, p. 145, Tab. XVI, fig. 3. 



Localities. Red Crag, Sutton and Butley. Eluvio-marine Crag, Bramerton. Chilles- 

 ford bed, Horstead, Coltishall, and Aldeby. Lower Glacial, Belaugh. Middle Glacial, 

 Hopton. Upper Glacial, Bridlington. Post Glacial, March and Kelsea Hill. 



This shell appears to be rare in the Red and Fluvio-inarine Crags, but common in the 

 Chillesford bed at certain localities. It is rare in the Lower Glacial, and a single young 

 specimen only has occurred in the Middle. It is very abundant and of large size in the 

 March gravel. Mr. Jeffreys gives it as rare at Kelsea Hill. 



Three small specimens were found by myself in the Coralline Crag of Sutton, which I 

 once thought belonged to the genus Natica, and I called them Natica depressula (' Crag 

 Moll.,' vol. i, p. 149), but which I afterwards described in vol. ii, p. 319, as Jeffreysia 

 patula. I am sorry to say no other specimen resembling them has since come into my 

 possession. Mr. Jeffreys says they are the fry of Velutina viryata. They are probably 

 the fry of some species, but I think not of viryata, as my Crag specimens of that 

 species have a larger and more obtuse apex. 



Amaura Candida, Moller. Supplement, Tab. I, fig. 3 a, b. 



Amaura Candida, Moll. Ind. Moll. Groenl., p. 7, 1842. 



— — H. and A. Adams. Genera, vol. i, p. 214, pi. xxii, fig. 9, 1858. 



— A. Bell. Ann. and Mag. Nat. Hist., September, 1870. 



Locality. Red Crag, Butley. 



