436 MOLLUSCA GASTKOPODA SUB-KINGDOM vr 



Sub-Order C. TELEOPLACOPHORA. Pilsbry. 



All valves, or the first seven, with insertion plates cut into teeth by slits; the teeth 

 sharply sculptured (pectinated) outside by fine vertical grooves. 



Family 1. Chitonidae. Pilsbry. 



Characters those of the sub-order. Tertiary and Eecent. 



The family is illustrated by the following genera, of which only the first two occur in 

 the fossil condition : Chiton, Linne ; Trachyodon, Ball ; Eudoxochiton, Shuttleworth ; 

 Tonicia, Schizochiton, Enoplochiton, and Onithochiton, Gray ; Acanthopleura, Guilding ; 

 Lorica, Adams ; Loricella and Liolophura, Pilsbry. 



Class 4. GASTROPODA. Snails. 1 



Mollusks with distinct head, soled or more rarely fin-like foot, and undivided 

 mantle, which latter secretes a simple, spirally wound, or saucer-shaped shell. 



Gastropods differ from Pelecypods in having a more or less distinctly 

 marked head, which usually bears tentacles, eyes, and ears, and contains a 



1 Literature (see also under the head of Mollusca, pp. 344-345) : 

 d'Orbigny, A., Paleontologie francai.se. Terrains cretaces, vol. II., 1842. Terrain jurassique, vol. 



II., 1850, and vol. III. (continuation by Piette), 1867-91. 

 Beyrich, E., Die Conchylien des norddeutschen Tertiargebirges (Zeitschr. deutsch. geol. Gesellsch., 



vols. V., VI., VIII.), 1853-56. 

 Troschel, F. H., Das Gebiss der Schnecken, zur Begriindung einer natiirlichen Classification, vols. I., 



II., Berlin, 1856-78. 



Billings, E., Palaeozoic Fossils, vols. I. and II., Montreal, 1865-74. 

 Stoliczka, F., Cretaceous Fauna of Southern India, vol. II. Gastropoda (Mem. Geol. Survey, India), 



1868. 

 Salter, J. W., A Catalogue of the Collection of Cambrian and Silurian Fossils in the Museum of 



Cambridge, 1873. 

 Zittel, K. A,, Die Gastropoden der Stramberger Schichten (Palaeont. Mittheil. Mus. bayer. Staates, 



Bd. II. Abtheil. 3), 1873. 

 Ihering, H. von, Vergleicheude Anatomie des Nervensystems und Phylogenie der Mollusken. 



Leipzic, 1877. 

 Hoernes, R., and Auinger, M., Die Gastropoden der Meeresablagerungen der ersten und zweiten 



miocanen Mediterranstufes. Vienna, 1879-92. 

 Koninck, L. G. de, Faune du calcaire carbonifere de la Belgique (Ann. Mus. d'hist. uat. de Belgique, 



vol. VI. pt. 3, and vol. VIII. pt. 4), 1881-83. 

 Lindstrom, G., On the Silurian Gastropoda and Pteropoda of Gotland (K. Svenska Vetensk. Akad. 



Handl., Bd.XIX. Heft 2), 1881. 



Quenstedt, F. A., Petrefaktenkunde Deutschlands, Band VII. Gastropoden. 1884. 

 Hudleston, W. H., A Monograph of the British Jurassic Gasteropoda (Palaeontographical Society), 



1887-94. 



Philippi, R. A., Die tertiaren und quartiaren Versteinerungen Chiles. Leipsic, 1887. 

 Koken, E., Ueber die Entwickeluug der Gastropoden vom Cambrium bis zum Trias (Neues Jahrb. 



fur Mineral., Beilage, Bd. VI.), 1889. 

 Koken, E., Die Gastropoden der Trias urn Hallstadt (Abhandl. k. k. geol. Reichsanstalt, Wien, Bd. 



XLVI. Heft. 1), 1896. 

 Kittl, E., Die Gastropoden der Schichten von St. Cassian der siidalpinen Trias (Ann. k. k. naturhist. 



Hofmuseums, vols. VII., VIII.), 1891-92. 



Newton, R. B., Systematic List of British Oligocene and Eocene Mollusca. 1891. 

 Dall, W. H., Contributions to the Tertiary Fauna of Florida (Trans. Wagner Free Inst. Sci., vols. 



III., IV.), 1895-97. 

 Vinassa de Regny, P. E., Synopsis dei molluschi terziari delle Alpe venete (Palaeoutogr. Italica, 



vols. I., II.), 1896-97. 

 Harris, G. F., The Australasian Tertiary Mollusca (British Museum Catalogue of Tertiary Molluscn, 



Part L), 1897. 



