NArXILID^. 
323 
. Localities. Highgate Archway, Hampstead, Primrose Hill, Whet- 
* stone, near Kew Bridge, near Chalk Farm ; Middlesex : Sydenham, 
Woking; Surrey: Isle of Sheppey. 
( Well represented in the Collection, which includes the specimens 
figured by J. Sowerby, and J. de C. Sowerby in the ‘ Mineral Con- 
^ chology.’ Xo. 16870 was presented by Sir William Clay, Bart. 
Bellardi ^ places N. BucHandi , Michelotti, in the synonymy of 
X. Allionii, Michelotti and states that the latter is distinct from 
I N. imperialis, J. Sow., the former being a Miocene and the latter an 
Eocene species. 
Nautilus Sowerbyi, Wetherell. 
1836. Nautilus Soiverbi/i, Wetherell, London, Edinburgh, and Dublin 
Phil. Mag. and Journ. Sci. vol. ix. p. 466. 
1843. Nautilus Sowerh/i, J. de C. Sowerby, Min. Conch, vol. vii. p. 36, 
pi. dcxxvii. ff. 1-3. 
1849. Nautilus Soioerbyi, Dixon, Geology and Fossils of the Tertiary 
and Cretaceous Formations of Sussex, p. 121, pi. xiv. f. 28. 
1849. Nautilus Sowerbyi, Edwards, Mon. of the Eocene Cephalopoda 
and Univalves of England, vol. i. (Pal. Soc.), p. 48, pi. vi. 
1862. Nautilus Sowerbyi, Giebel, Fauna der Vorwelt, Baud iii. Abth. 
; i. p. 162. 
' 1854. Nautilus Soiverhyi, Morris, Cat. of British Fossils, 2nded. p. 306. 
1854. Nautilus Soicerbi/i, Pictet, Traits de Paleontologie, 2nd ed. 
j vol. ii, p G20. 
1872. Nautilus Soiverhyi, Whitaker, Geology of the London Basin, 
; Mem. Geol. Surv. of England and Wales, vol, iv. p. 689. 
] 1886. Nautilus Sowerbyi, Kaufmauu, Beitriige zur Geol. Karte der 
' Scliweiz, Lief. xxiv. p. 281. 
1890. Nautilus Sowerbyi, Foord and G, C. Crick, Anp. Mag. Nat. 
I Hist. ser. 6, vol. v. p. 391. 
I Sp. Char. “ The N. Soiverhyi is an exceedingly well-marked 
i species. It is a smooth, discoidal, convex, or rather lenticular shell, 
^ somewhat resembling in shape the Dax form of Aturia {Nautilus) 
J ziczac, but it is narrower towards the margin, which circumstance 
' gives a triangular form to the aperture. The septa are very con- 
cave, and present on each side a broad undulation, with a deep 
sinus-like depression caused by a lateral lobe, more developed in 
this species than in N. urhanus, although not attaining the size and 
^ I Molluschi dei Terreni Terziari del Piemonte e della Liguria, 1872, pt. i. 
p. 21. 
^ Descr. des Fossiles des Terrains Miocenes de iTtalie septentrionale, 1847, 
