NAUTILID^. 
240 
1890. Xautilus radiatus, Foord aud G. C. Crick, Ann. & Mag’. Nat. 
Hist. ser. 6, vol. v. p. 398. 
IS 2 ). Char. “ Shell somewhat compressed upon the sides, rounded 
upon the periphery; section of the whorls wider than high. Um- 
bilicus closed, though open in the cast. Septa rather numerous, 
slightly curved upon the sides, a very obscure sinus upon the peri- 
phery. Siphuncle situated below the centre. Ornaments of the 
test consisting of numerous, very coarse, prominent, obtuse ridges, 
separated by interspaces of about half their own width. The ridges 
are each about 3 lines wide upon the periphery, where they form a 
narrow backwardly-directed sinus. 
Bemarls. “ Pictet and Campiche, in the Pal. Suisse \ have adopted 
the name Kaatihis Xeckerianus for a form which is evidently iden- 
tical with Sowerby's N. radiatus, and the source of error seems to 
have been in the locality of the type specimen of the last-named 
species, which is referred to by Sowerby " in the following words : — 
• Lately found in the neighbourhood of Maltor, probably in the 
lower part of the Green Sand formation. I have received but one 
specimen, a cast in Marly Limestone, mixed with grains of Silex 
and of blackish Green-earth.’ Possibly the locality quoted by 
Pictet and Campiche was taken from the Supplementary Index to 
the ‘ Mineral Conchology ’ by Mr. John Farey, who gives ‘ New- 
Malton, E.,’ as the locality of the type. 
“AVe have been able to identify Sowerby’s type in the ‘ Sowerby 
Collection,’ and the matrix agrees with that described by Sowerby, 
showing that the specimen came from the Lower Greensand. In 
its mode of preservation and general appearance as to colour, 
texture, &c., it closely resembles specimens from the Lower Green- 
sand of Hythe. Without doubt Sowerby’s specimen was derived 
from the Lower Greensand, but we have not been able to obtain 
any clue as to the locality (Maltor), furnished by him in his descrip- 
tion, above quoted. 
“ There seems to be no ground whatever for Young and Bird’s 
statement on p. 271 of their work on the Yorkshire Coast (2nd 
ed.), that ‘ Sowerby’s W. radiatus (tab. 256) was found near 
Malton, most probably in the grey limestone under the Oolite.’ 
Those authors were probably misled by the locality given by 
Farey in the Supplementary Index to vol. iv. of the ‘Mineral 
Conchology.’ 
^ Ser. ii. pt. i. 1859, p. 132, pi. xvi. 
2 Min. Conch, vol. iv. 1822, p. 78, pi. ccclvi. 
