NACTILIDJ?. 
313 
however, from the latter in its much greater thickness and more 
distant septa. From Vaehtmis, Einkhorst, it is distinguished 
by its more rapidly increasing whorls, small umbilicus, and more 
sinuous septa. 
Horizon. Xeocomian. 
Locality. Sends (Appenzell), Switzerland. 
Represented in the Collection by a single fragment. 
Nautilus (Hercoglossa) Danicus, Schlotheim, sp. 
[See supra, p. 179, f, 32, b, c.] 
1820. Nautilus Danicus, Schlotheim, Die Petrefactenkunde, p. 83. 
1834. Nautilus Danicus, v. Buch, Xeiies Jahrbuch fur Mineralogie, &c. 
p. 0.33. 
1835. Nautilus Danicus, Beck, Proceed. Geol. Soc. vol. ii. p. 218. 
1837. Nautilus Danicus, Lyell, Trans. Geol. Soc. vol. v. pt. i. p. 250, 
pi. xviii. tf. 4-7. 
1837. Nautilus Danicus, von Buch, Ueber den Jura in Deutschland 
(Akad. der Wissensch.l, p. 119. 
1850. Nautilus Danicus, Geinitz, Das Quadersandsteingebirge oder 
Kreidegebirge in Deutschland, p. 110. 
1650. Nautilus Danicus, d'Orbigny, Prodr. de Paleont. Stratigr. vol ii. 
p. 290. 
1851. Nautilus Danicus, d’Orbigny, Xeues Jahrbuch fiir Min. p. 101. 
1852. Nautilus Danicus, Giebel, Fauna der Vorwelt, Band iii. Abth. i. 
p. 138. 
1861. Nautilus Danicus, Binkhorst, Mon. des Gast^ropodes et des 
Cephalopodes de la Craie Superieur du Limbourg, pt. ii. p. 16. 
1865. Nautilus Danicus, Blanford, Mem. Geol. Surv. India — Palaeont. 
Indica — i. Foss. Ceph. Cretaceous Rocks of S. India, p. 24, pi. x. 
ff. 4, 4 a, pi. xi. 
1865. Nautilus Danicus, Stoliczka, ibid. p. 208. 
1867. Nautilus Danicus, Lundgren, Palaeontologiska lakttagelser ofv'er 
Faxekalken pS Limhamn (Cr Universitets Arsskrift), p. 12. 
1868. Nautilus Danicus, Dewalque, Prodrome d'une Description G(5o- 
logique de la Belgique, p. 358. 
1868. Nautilus Danicus, Stoliczka, Rec. Geol. Surv. India, no. 2, p. 32. 
1885. Nautilus Danicus, Moberg, Sveriges Geologiska Undersokning, 
ser. C, no. 73, p. 11, Taf. i. ff. 7-12. 
1890. Nautilus {Hercoglossa) Danicus, Foord and G. C. Crick, Ann. 
Mag. Nat. Hist. ser. 6, vol. v. p. 407, f. 8. 
Sp, Char. “ Shell subinflated, flattened on the sides, narrowly 
rounded on the periphery ; umbilicus closed. Septa moderately 
distant, being 5 lines apart on the periphery, where the height of 
the whorl is 11 lines. Sutures forming an acute, forwardly- 
directed lobe near the umbilicus, then bending backwards into a 
somewhat broader lobe, and again directed forwards towards the 
