XAFTILID^. 
239 
1875. Nautilus Franconicus, von Ammon, Die Jura Ablagerungen 
zwischen Regensburg und Passaii, p. 163, Taf. i. f. 1. 
1875. Nautilus Franconicus, Favre, Descr. des Foss, du Terr. Jiirass. 
de la Montague des Yoirons (Savoie), Mem. Soc. Pal. Suisse, vol. ii. 
p. 16, pi. i. ff. 6 «, 6 h. 
1876. Nautilus Franconicus, de Loriol, Mon. Pal. des Coucbes de la 
zone a Ammonites tenuilohatus, Mem. Soc. Pal. Suisse, vol. iii. pt. i. 
? 1877. Nautilus ar/aniticus, Blake and Hudleston, On tbe Coralline 
Rocks of England, Quart. Journ. Geol. Soc. vol. xxxiii. p. 400. 
? 1878. Nautilus ayaniticus, Hndlestou, The Yorkshire Oolites, Proceed. 
Geologists’ Association, vol. v. no. 8, p. 482. 
1878. Nautilus Franconicus, Herbich, Das Szeklerland mit Beriick- 
sichtigung der angrenzenden Landestheile (Mittheil. aus dem 
Jahrb. der Kcin. Ungar. geol. Anstalt, Band v. Heft ii.), p. 139, 
Taf. i. f. 3. 
1881. Nautilus Franconicus, Schlosser, Die Fauna des Kelheimer 
Diceras-Kalkes, Abth. i. p. 61 ; Palfeontographica, Band xxviii. 
1890. Nautilus Franconicus, Foord and G. C. Crick, Ann. & Mag. Nat. 
Hist. ser. 6, vol. v. p. 395, f. 2. 
Fig. 57. 
Nautilus {Hercoglossa) Franconicus. — a, lateral view, showing two of the septa, 
and a peculiar ridge at the base of the body-chamber ; tbe curved line upon 
the cast of the latter is the anterior boundary of the impression of the 
shell-muscle ; the test which covers the greater portion of the septate part 
of the shell is covered with fine lines of growth ; they are a little too dis- 
tinct in the engraving, h, peripheral view, showing the flattening of tbe 
sides and periphery. Drawn from a specimen in the British Museum 
(No. C. 3109). Nearly two thirds natural size. 
