78 SUPPLEMENT TO THE CRAG MOLLUSCA. 
references ; the shell more resembling JVat. heros, Say, to which Mr. Jefireys 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 WV. helicina, Broc. JV. 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 Monracutt, Mordes. Supplement, Tab. LV, fig. 10. 
Natica Monracurt, Fors. Malac. Monen., p. 32, pl. ii, figs. 3, 4. 
Locality. Upper Glacial, Bridlington. 
My figure represents a specimen in the British Museum, among the Bridlington 
Fossils, 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. 1, p. 43. 
Natica HELIcoIDES, Johnston. Crag Moll., vol. i, p. 145, Tab. XVI, fig. 3. 
Localities. Red Crag, Sutton and Butley. Fluvio-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-marime 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 genns Watica, and I called them Watica depressula (‘ Crag 
Moll.,’ vol. i, p. 149), but which I afterwards described in vol. ui, p. 319, as Jeffreysia 
patula. {am sorry to say no other specimen resembling them has since come into my 
possession. Mr. Jeffreys says they are the fry of Velutina virgata. They are probably 
the fry of some species, but I think not of virgata, as my Crag specimens of that 
species have a larger and more obtuse apex. 
Amaura canpiIDA, Moller. Supplement, Tab. I, fig. 3 a, 6. 
AMAURA CANDIDA, Moll. Ind. Moll. Groenl., p. 7, 1842. 
— — H. and A. Adams. Genera, vol. i, p. 214, pl. xxii, fig. 9, 1858. 
_ —_— A, Bell. Ann. and Mag. Nat. Hist., September, 1870. 
Locality. Red Crag, Butley. 
