NAUTILID^. 247 
1849. Xautilus plicafus, d'Orbigny, Prodrome de Paleontologie Fran- 
9 aise, vol. ii. p. 112. 
1852. Nautilus plicatus, Giebel, Fauna der Vorwelt, Band iii. Abth. i. 
p. 143. 
1854. Nautilus plicatus, Morris, Catalogue of British Fossils, 2nd ed. 
p. 307. 
1858. Nautilus plicatus, Ooster, Catalogue des C^pbalopodes Fossiles 
des Alpes Suisses, pt. iii. p. 12. 
1861. Nautilus plicatus, Reynas, Etudes sur le Synclironisnie et la 
Delimitation des Terrains Cretaces du Sud-Est de la France, 
pp. 55, 89, 92. 
1883. Nautilus plicatus, Leenbardt, Etude Geologique de la Region du 
Mont Ventoux, pp. 56, 71, 90. 
1883. Nautilus plicatus, Uhlig, Die Cepbalopodenfauna der Werns- 
dorfer Scbicliten (Denkscbr. der k. Akad. der Wissenscb.), Band 
xlvi. p. 178, Taf. iii. 
Sp. Char. Fitton’s description of this species is limited to a very 
few words, which are accompanied by a woodcut, showing the 
characteristic sculpture of the species. He says “ Some specimens 
8 inches high, and 8 in diameter. The zigzag markings on the 
outside are very characteristic.” 
A further brief description of the species is given by James de 
Carle Sowerby^ as follows : — “The Woodcut at p. 129 represents a 
portion of Nautilus plicatus, one third of the original size. The 
parallel linear furrows which pass over the whorls are bent three 
times at acute angles, once on each side and once in the middle, 
the central angle being directed backwards. There is often some 
irregularity in the junction of the lines at the angles.” 
Remarks. The most striking feature in this species is its rotundity, 
recalling, in this respect, theW. perinflatus of Foord andG. C. Crick, 
from the Inferior Oolite (see ante, p. 228). The whorls in section 
are more than double as wide as high, the septa somewhat approxi- 
mate ; the umbilicus is closed ; the siphuncle is nearly central, or, 
if anything, a little above the centre. The sculpture has been well 
described by Dr. Fitton. 
Giebel and Ooster make J. de C. Sowerby the author of this 
species, but though the latter added a more detailed description of 
it to Fitton’s, yet Fitton not only bestowed the name but figured 
it and pointed out its characteristic sculpture. There can therefore 
be no question about Fitton being the author. 
' Trans. Geol. Soc. ser. ii. vol. iv. 1835, pt, ii. ; Dr. Fitton, “ On the Strata 
below the Chalk,” Appendix A, p. 349. 
