242 
NAUTILOIBEA. 
The differences between the present species and Nautilus {Herco- 
glossa) aganiticus^ its nearest ally, have already been pointed out in 
the description of the latter. 
Horizon. Portland Oolite \ 
Locality. Isle of Portland (?), Dorsetshire. 
CRETACEOUS SPECIES. 
Nautilus sublsevigatus, d’Orbigny. 
1840. Nautilus Iceviyatus^ d’Orhigny, Paleontologie Fran^aise (Ten-ains 
Cr<5taces), p. 84, pi. xvii. 
1850. Nautilus sublceviyatus, d’Orbiguy, Prodrome de Paleontologie 
Stratigraphique, vol. ii. p. 189. 
1850. Nautilus Icevigatus, Geinitz, Das Quadersandsteingebirge oder 
Kreidegebirge in Deutschland, p. 110. 
1852. Nautilus cretaceus, Giebel, Fauna der Vorwelt, Band iii. Abth. i. 
p. 149. 
1853. Nautilus Iccmgatus, Sharpe, Description of the Fossil Remains of 
Mollusca found in the Chalk of England, pt. i. Cephalopoda (Mon. 
Pal. Soc.), p. 11, pi. ii. if. 1 rt, 1 2 a, 2 6. 
1854. Nautilus sublcevigatus, Millet, Paleontologie de Maine et Loire, 
p. 114. 
1854. Nautilus Icevigatus, Morris, Catalogue of British Fossils, 2nd ed. 
p. 307. 
1858. Nautilus cretaceus, Ooster, Catalogue des Cephalopodes Fossiles 
des Alpes Suisses, pt. iii. p. 14. 
1859. Nautilus subl<^vigatus, Pictet et Campiche, Descrip, des Fossiles 
dll Terr. Cr^tac^s des Environs de Sainte-Croix (Paleeont. Suisse, 
s4r. ii. pt. i. livr. vii.), p. 140. 
1862. Nautilus Icevigatus, Bristow and Etheridge, in Bristow’s Geology 
of the Isle of Wight (Mem. Geol. Surv. of Great Britain, Sheet 10), 
p. 137. 
1863. Nautilus Icevigatus, Strombeck, Zeitschr. der Deutsch. geol. 
Gesell. vol. xv. p. 136 (partim). 
1865. Nautilus Icevigatus, Tate, Quart. Journ. Geol. Soc. vol. xxi. 
p. 28. 
1866. Nautilus sublcevigatus, Beltremieux, Faune Fossile du D^parte- 
ment de la Charente-Inferieure, pp. 49, 80. - 
1869. Nautilus sublcevigatus, Favre, Description dgg Molliisques Fossiles 
de la Craie des Environs de Lemberg, p. 9. 
1870. Nautilus Icevigatus, Longuemar, Etudes Geologiques et Agrono- 
miques sur le D^partement de la Vienne, p. 487. 
1871. Nautilus Icevigatus, Phillips, Geology of Oxford and the Valley 
of the Thames, p. 441. 
Portlandien of d’Orbigiiy. 
