NATURAL SCIENCES OF PHILADELPHIA. 469 



Gray, J. E On the Structure of Humphreyia, Ann. and Mag. 



Nat. Hist. 3d ser. ii. p. 16, 1858. 

 On the Families of Aspergillidae, Gastrochaenidae 

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 part xxvi. p. 307, 1858. 



Gualtieri Index Test, 1742. 



Gnettard Mem. de l'Academie Paris, ii. 1774. 



Hanley, S Descriptive Catalogue of Recent Bivalve Shells, 1842. 



Jay, J. C Catalogue of Shells, 4th edit. 1850. 



Klein Tentamen Ostracologicae, 1753. 



Knorr Vergniigen der Augen, etc., 1773. 



Lamarck Animaux sans Vertebres, v. 1818. 



" " " vi. 1835, (Deshayes' edit.) 



Leach, W. E Mollusca of Great Britain, 1852. 



Linnaeus Systema Naturae. 



Lister Historiae Conchyliorum, 1685. 



Lukis, F. C Observations on the Molluscous Animals of the genus 



Gastrochaena, &c, Loudon's Magazine of Natural 

 History, vi. p. 401, 1833. 



Martini Conchylien Cabinet, i. 1769. 



Maton and Rackett Linn. Trans. London, viii. 1807. 



Mawe Linnaean System of Conchology, 1823. 



Megerle Berl. Mag. 1811. 



Menke Synopsis Methodica Molluscorum. 



Montagu Testacea Britannica, 1803. 



Morch Catalogue, 1853. 



Muller, Th Synopsis Test. Viv. 1S36. 



Oken Lehrbuch, 1815. 



Olivi Zoologia Adriatica, 1792. 



Owen, R , On Anatomy of Clavagella. Zool. Trans. Lond. 1835. 



Pennant British Zoology, iv. 1777. 



Perry Conchology, 1811. 



Philippi Enumeratio Molluscorum Siciliae, i. 1836; ii. 1844. 



Wiegmann's Archiv fur Naturgeschichte, i. 1840. 



Poli Testacea utriusque Siciliae, 1791. 



Potiez et Michaud Gallerie des Mollusques, ii. 1844. 



Pultney Dorsetshire Catalogue, 1799. 



Rang Manuel des Mollusques, 1829. 



Reeve, Lovell.. Conchologica Systematica, 1843. 



Monograph of Aspergillum, Conch. Iconica, 1860. 



Reichenbach. Conchylien, 1842. 



Requier Catalogue des Coquilles du Corse, 1848. 



Retzius Nov. Testaceorum Genera, 1788. 



Rumphius Amboinsche Rariteitkamer, 1705. 



Riippell Reise, Nord Afric. 



Savigny Mollusques, in Description de l'Egypte, 1826. 



Scacchi MSS. quoted by Philippi. 



Schreibers Versuch nach Conchylien, 1793. 



Schroeter Einleitung in die Conchylien Kentniss, ii. 1784. 



Schumacher Essai d'un Noveau Systeme, 1817. 



Shaw Naturalist's Miscellany, vi. 



Sowerby Genera of Recent and Fossil Shells, 1820 '24. 



Conchological Manual, edit. 2, 1842. 



In Zool. Proc. Lond. 1834. 



Illustrations of British Conchology. 1859. 



Spengler Nov. Act. Sc. Soc. Hafn. ii. 1780. 



Thorpe, Charles British Marine Conchology, 1844. 



Turton Conchylia dithyra Insularum Brit. 1822. 



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