CLASSIFICATION. i 
Prosobranchiata according to (1) Fiscunr (‘ Manuel de Conchyliologie, &c.,’ par le 
Dr. Paul Fischer, Paris. Gasteropoda concluded February, 1886). (2) Tryon 
(‘ Structural and Systematic Conchology,’ by George W. Tryon, junr., Phila- 
delphia, 1882-4). (3) Tary (Woodward’s ‘Manual of the Mollusca,’ 4th edition, 
with appendix by Ralph Tate, A.L.S., F.G.S., London, 1880). (4) SroniczKa 
(‘ Paleontologia Indica,’ ‘* Cretaceous Gasteropoda,” by Ferd. Stoliczka, Ph.D., 
F.G.S., Caleutta, 1868); and (5) Morris anp Lyconrr (Paleontographical Society, 
‘Monograph of the Great-Oolite Mollusca,’ by J. Morris, F.G.S.,and John Lycett, 
London, 1850-4). 
