204: Jlr. K. B. Newton on Fossil MAhnca c&c. 



he recognized in tlie rocks of Northern Italy (Vicentin), and 

 wliich were stated to range geologically from the Lower 

 Eocene to Aquitanian *, their maximum size heing reached 

 in tlie latter horizon. Tliis record was, however, unaccom- 

 j)anied by a description, figure, or reference to ppeclfic fornix, 

 and so failed to have any scientific importance from the 

 nomenclature point of view. 



In the same memoir Mnnier-Chalmas notified that he had 

 previously alluded to this generic name in the Bull. Soc. 

 U^ol. France, 1891, s^r. 3, vol. xix., but without giving the 

 pagination. A careful perusal of the volume has proved the 

 inaccuracy of such a statement, no mention of Orthophrag- 

 viina being found ; so that it can oidy be surmised that the 

 author had in preparation a paper upon the subject which 

 apparently never saw publication. 



Later on Schlumberger tj ^vho had been studying the 

 structure of Orbitot'des, commenced to issue a series of papers 

 in which the genus Orthophragmina was adopted, with 

 Orhitoides jyratti as the type, this being the equivalent of 

 Orhitolites pratti, Michelin (see references in footnote, 1001, 

 p. 464, and 1903, p. 274), originally described from the 

 snpra-Oretaceous beds of the environs of Biarritz, France. 



Giimbell had previously regarded Michelin^s pratti as 

 svnonymous with JS'ximmulites papyraceus of Boubee (Bull. 

 Soc. G^ol. France, 1832, vol. ii. p. 445), which he placed 

 under the genus Orhitoides , as well as recognizing it as the 

 type of his subgenus Discocyclina. 



Later researches have demonstrated that the structures of 

 these two species are not the same, Schlumberger detei mining 

 Bonbcc's papyraci'.ns as a true Orhiio'ules and resiricted 

 to Upper Cretaceous deposits. Hence it would app'ar that 



* All Aqnitanian example wiis not then mentioned speciiicnlly, al- 

 thouMi said to occur in " les calcaires d'Isola di Main " (see p. ly of the 

 Thesis). Later on in the same wurlv (p. 76) this form was refeired to as 

 Orthophnnjmina {Orbitoiclcs) elepfunitma, a species wliich was subse- 

 queutlv described and tigured h\ .Messrs. Lemoiue aud K. DouviKtS ( Mem. 

 Soc. Ueol. France, 1904, vol. xii. fasc. 2, Mem. no. 3-, pi. ii. ti<rs. l;5, lit, 

 p. 13) as a Lepiducyclina, and not Orthophnitpniiia. Tlie genua Ortho- 

 phragmina is therefoi'e essentially Eocene, being found as high as the 

 I'riabouian stage, which is regarded alike as uppermost Eocene or the 

 lowest part of the Oiigoceue. It does not occur in a later horizon. 



t Bull. Soc. G6ol. France, UH)1, ser. 4, vol. i. pi. vii. pp. -155^-407 

 (Cretaceous) ; ibid. I'JOl*, ser. 4, vol. ii. pi. vi. pp. ioo-l'lil (Cretaceous) ; 

 ibid. 1903, ser. 4, vol. iii. pis. viii.-xii. pp. •_>73-l'89 (Eocene) ; ibid. 1904, 

 t«5r. 4, vol. iv. pis. iii.-vi. pp. 119-135 (Eocene). 



t /6k/. p. \V2. 



