EXPLANATION OF THE REFERENCES. 
Tableau Encyclopedique et Méthodique, 23me. partie, 
4to. Paris, 1816. 
Leach. Zoological Miscellany, by Dr. Leach, 8vo. 3 vols. 
London, 1814. 
finn. Caroli a Linné Systema Nature 
Montagu. 'Testacea Britannica, by George Montagu. 
Romsey, 1803. 
Muller. Vermium Terrestrium et Fluviatilium, Auctore 
O. F. Muller. Hafnize et Lipsiz, 1773. 
Pallas. P. 8. Pallas. Spicilegia Zoologica. Berol, 1767 
1780. ‘ 
Seba. Albertus Seba. Descriptio Thesauri rerum WNa- 
turalium. Amsterdam, 1758. 
Solander, or Soland. Manuscript Description of Shells, 
by the late Dr. Solander, in the possession of Mr. 
George Humphrey. 
Sw. W. Swainson. 
Sw. Lx. Conch. Exotic Conchology, by W. Swainson, 
4to. London, now in a course of publication. 
Sw. Zool. Lil., or Sw. Zool. Illus. Zoological Tlustra- 
tions, by W. Swainson, 8vo. London, now in a course 
of publication. 
