No CrossRef data available.
We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
Published online by Cambridge University Press: 01 May 2009
Italian geologists have made several valuable contributions to our knowledge of the Jurassio strata of their country. Unfortunately some of their works are not known here as they deserve to be, and seem difficult to obtain. At the same time I have to acknowledge with thanks the receipt of some valuable memoirs which have been of particular service; and one of the latest arrivals is the present pamphlet.
Osservazioni sul Toarciano e l'Aleniano dell' Apennino centrale. Boll. d. Soc. geol. italiana, vol. xii. fasc. 2, pp. 195–254. Rome, 1893.
page 298 note 1 Fanne du Calcaire Carboniftre de la Belgique (Annales du Mus. Eoy. d'Hist.nat. de Belgique, vol. ii.), part i. 1878, p. 115, pl. xxiv. ff. 2a, b.
page 299 note 1 I propose this name as a sort of colloquial word, congruous with Ammonites, Ceratites, Goniatites, etc., to distinguish those genera which are certainly not true Ammonites, either in characters or hy descent, namely, Lytoceras, Pleuracanthites, Phylloceras, Monophyllites, etc. They are characterized by the phylliform cells of the septa, and probably by the absence of any calcareous Aptychus or Anaptychus. Lytoceratites are biologically lower than Ammonites, though they are collateral and coeval. They were separated by Hyatt (Genesis Arietidæ, p. 4) as Lytoceratinœ; but this places Lytoceratinœ superior to Lytoceratidœ, whereas it should be of inferior rank. The terms Lytocerataceœ and Ammonacece (the latter used many years ago) might indicate Lytoceratites and Ammonites respectively, and be subdivisions of Ammonoidea.
page 299 note 2 “Genetic Relations of Stephanoceras,” Proc. Boston Nat. Hist. Soc. vol. 18, p. 386, 1876.Google Scholar
page 299 note 3 Hyatt, , op. cit. p. 368 (E. B. Tawney's information).Google Scholar