396 Messrs. Foord and Crick on new and 



1870. Nautilus aganiticus, F. Roemer, Geologie von Oberschlesien, 

 p. 252, Taf. xxiv. fig. 6. 



1871. Nautilus cf. strambergensis, Herbich, Verb., u. Mittb. des natur- 

 wiss. Veroines zu Herrmanstadt. 



1873. Nautilus franconieus, Neumayr, Die Fauna der Schichten mit 



Aspidoceras acanthicum, Abliaudl. der k.-k. geol. Reicbsanst. Band v. 



Heft 6, p. 156. 

 1875. Nautilus franconieus, von Amnion, Die Jura-Ablagerungen 



zwiscben Regensburg und Passau, p. 103, tab. i. fig. 1. 

 1875. Nautilus franconieus, Favre, Descr. des Foss. du Terr. Jurass. 



de la Montagne des Voirons (Savoie), Mem. Sue. Pal. Suisse, vol. ii. 



p. 10, pi. i. figs. a, b. 

 1870. Nautilus franconieus, de Loriol, Mon. Pal. des Coucbes de la zone 



a Ammonites tenuilobatus, Mem. Soc. Pal. Suisse, vol. iii. pt. i. p. 13. 

 ?1877. Nautilus aganiticus, Blake and Hudleston, On tbe Coralline 



Rocks of England, Quart. Journ. Geol. Soc. vol. xxxiii. p. 400. 

 ? 1878. Nautilus aganiticus, Hudleston, Tbe Yorksbire Oolites, Proc. 



Geol. Assoc, vol. v. no 8, p. 482. 

 1878. Nautilus franconieus, Herbicb, Das Szeklerland mit Beriick- 



sicbtigung der angreuzendeu Landestheile, Mittbeil. aus dem Jabrb. 



der kon. ungar. geol. Anstalt, Band v. Heft 2, p. 139, Taf. i. fig. 3. 

 1881. Nautilus fra77Conici<s,Sch\osseY, Die Fauna desKelheimerDiceras- 



Kalkes, Abtb. i. p. 01, Paheontographica, Baud xxviii. 



Sp. char. Shell much compressed laterally, flattened upon 

 the periphery ; the latter broad, with (in the cast) rounded 

 borders. The greatest width of the whorls is in the umbilical 

 region. The umbilicus is very small. The septa are mode- 

 rately distant, the sutures very strongly bent, first forwards 

 in a narrow lobe on leaving the umbilicus, then backwards in a 

 broader one, then sweeping forward again and making a con- 

 spicuous sinus on the periphery. The siphuncle is situated 

 considerably above the centre. 



Remarks. Though Oppel, Zittel, and Neumayr unite in 

 regarding Nautilus strambergensis as a distinct species from 

 the present one, the resemblance between the two is very 

 striking. The only difference between them is in the form 

 of the sutures, which make a wider (backwardly directed) 

 lobe on the sides of the shell in N. franconieus than they do 

 in iV. strambergensis, and this distinction is expressed in the 

 figures of the latter given by Zittel {he. cit.) } which other- 

 wise agree perfectly with specimens of N~. franconieus with 

 which we have compared them. The name franconieus was 

 originally conferred by Oppel * upon a specimen from the 

 Lithographic Slate of Solenhofen. 



* " Die Titboniscbe Etage," Zeitscbr. der deutscb. geol. Gesell. 

 Baud xvii. p. 540. Tbe " Tithouian " is a special group of the Upper 

 (White) Jura, including tbe period embraced between tbe Oxfordian and 

 Portlandian series. See Oppel's 'Die Juraformation Euglauds, Frank- 

 reichs und des siidwestlichen Deutschlauds,' 1858; also Zittel's "Die 

 Cephalopoden der Straniberger Schichten," Palseont. Mittheil. Band i. 

 Abth. ii., 1868. 



