WORKS REFERRING TO TJNIONID^. 155 



Sow. Sowerby. 7%e Genera of Shells, 1822. Min. Conchology, 1812-1830. Trans. Oeol. Soc. Zool. 



Journal, 1825. Conch. Manual, 1839, 2d ed., 1842. 

 Speng. Spengler. Skrivter of Naturhistorie Selslcabet, v. 3, 1792. 

 Spin. Spinelli. Cat. dei Moll, della Bresciana, 1851. Cat. dei Noll, in Venezia, 1869. 

 Spitzi. In Rossmdssler 's Iconographie. 

 Spix. Testacea Fluviatilia Braziliensia. 1827. 



Stab. Stabile. Prospers Sis. et Stat. Moll. Terr. e. Fl. di Lugano, 1859. 

 Stein. Schnecken and Muschelen der umgegend Berlins, 1850. 

 Stentz. Per Eossm. and Drouet. 

 Stimp. Stimpson. Shells of New England. 1851. 



Stride. Strickland. Fresh Water and Land Shells of Henley on the Thames, in May. Nat. Hist., vol. vii. 

 Stud. Studer. Schweizer Conchylien. 1820. 

 Swain. Swainson. Zool. Illust. Exotic Conch., 1841. Treatise on Malacology, 1840. 



Tap. Tappan. Am. Journ. of Sci. and Arts, 1839. 



Tate. On Land and Fr. Water Mollusca of Nicaragua, in Am. Jl. of Conch., vol. v., 1869. 

 Thompson. Cat. of Irish Shells, 1841. 

 Trask. Proc. California Acad. Nat. Sci., 1854-1855. 

 Tristram. Proc. Zool. Soc., 1863 and 1865. 



Troschel. Wieymanris Archives, 1847. Das Gel. der Schnecken, 1858. 



Turt. Turton. Conchylia Insular um Britannicarum, 1822, and Manual of Fresh Water and Land 

 Shells of the British Islands, new ed., 1840. 



Valen. Valenciennps. Continuation of Humboldt's Zool. Obs. 1827. 

 Vern. Verneuil. Mem. Oeol. Sur la Crimee. 



Villa. Catol. dei Moll, della Lomharia, 1844. Novarum Specierium, 1841. 

 V. d. Busch. Von dem Busch. Jl. de Conch. 



Waard. Waardenberg. Commentatis Moll. Belgico. 1827. 

 Wag. Wagner. In Testacea Fluviatilia, by Spix. 1827. 

 Ward. In Letter. 

 Williams. Philos. Mag. 1836. 



Wood. Index Testaceologicus, 1818-1825, and General Conchology. 1815. 

 Wood, S. Monog. Crag. Moll., 1848. 



Woodw. Woodward. Recent and Fossil Shells, London, 1851, 1854; 2d ed., 1868. Pro. Zool. Soc., 

 1859. 



Yoldi. MSS., and March 1 s Cat. of Yoldi's Cab., 1852 and 1853. 

 Zieg. Ziegler. MSS. 



