IHERINGS PROPOSED NATURAL SYSTEM. 277 



Families Litiorinidce Gray, RissoeUidcz Ad., Rissoidce (Gray) 

 Trosch., Cyclostoinacea (Pfr.) Trosch., Cyclotacea Trosch., Potnati- 

 acea Trosch., AcicuUdce (Gray) Kfst., PaludinidcB Gray, Melaniidce 

 Gray, Tubidibrajichia Guv., Turritellidce (Clark) Ad., and 

 t FyramidellidcE. Gray. 



Class II. : Orthoneura Ihering. 



Order I. : Rostrifera Ihering. 



Suborder I.: Rhipidoglossa (Trosch. p.) Ihering. 



Families JVo'itacea Lam., Heliciiiacea Pfr. & Proserpmacea Pfr. 



Suborder II. : Ptenoglossa Trosch. 



Yzxi\\}a&~> Jajithinidce Ad., Solariidce Kfst., and 1 Scalariidce- 

 (Brod.) Kfst. 



Suborder III.: T^nioglossa (Trosch. p.) Ihering. 



Families AmpuUariacea Guild., Valvatidce Gray, Capuloidea 

 Cuv., .? Phoridce. Gray, Sigaretina Trosch., Marseniadce. Bgh., 

 Cy presides Gray, Cerithiacea (Fer.) Mice., Alata Lam., and 

 AporrhaidcB- Gray. 



Order II. : Proboscidifera Ihering. 



Suborder I. : T^nioglossa (Trosch. p.) Ihering. 



Families Velutinidce Ad., SycolypidcE Ad., JJoliidoe. Ad., 

 Cassidea (D'Orb.) Gray, T?'itonudce Ad., and Ranellacea Trosch. 

 Suborder II. : Toxoglossa Trosch. 



Families Pleurotomacea (Hinds) Lov., CancellariidcB Ad., 

 Terebridx. Ad., and Conoidea Latr. 



Suborder III. : Rhachiglossa (Gray) Trosch. 



Families Vohitidce Gray, Harpidez (Ad.) Trosch., Olividos 

 (D'Orb.) Trosch., APitridx Ad., Strigaiellacea Trosch., Fascio- 

 lariidceA.6.., Columbellidoi (Ad.) Trosch., £ucci?iidce (Ad. p.) Carus, 

 Nassacea Trosch,, Purpuracea Trosch., and Muricidoe Trosch. 



