WOEKS EEPEEEING TO UKIONID^. 155 



Sow. ^o^erhj.— The Genera of Shells^imi. Mm. Oonchohgy, 1812-1830. Trans. Geol. Soc. Zool. 



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

 Speng. Spengler. — Skrivter af Naturhistorie Selskahet, v. 3, 1792. 

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

 Spitzi. — In Hossmdssler^s Iconographie. 

 Spix. — Testacea Fluviatilia Braziliensia. 1827. 



Stab. Stabile. — Prospetto 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. 



Strick. Strickland. Fresh Water and Land Shells of Henley on the Thames, in Mag. 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, 1868 and 1865. 



Troschel. — Wiegmann^s Archives, 1847. Das Oeh. der Schnecken, 1858. 



Turt. Turton. — Coiichylia Insularum Britannicarum,.1822, and Manual of Fresh Water and Land 

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



Valen. Valenciennes. — Continuation of Humboldt^ s Zool. Obs. 1827. 

 Vern. Verneuil. — Mem. Geol. Sur la Crimee. 



Villa. — Catol. dei Moll, della Lombaria, 1844. Novarum Specieriuni, 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.— P/w7os. Mag. 1886. 



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

 Wood, ^.—Monog. Crag. Moll, 1848. 



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

 1859. 



Yokll- MSS., and March's Cat. of ToldVs Cab., 1852 and 1853. 



Zieg. Ziegler.— J1/^;S'. 



