276 ihering's proposed natural system. 



Ihering (Dr. Hermann von). — Proposed Natural System 

 of Mollusca. — Versuch eines natiirlichen Systemes der 

 Mollusken. — Jahrb. Deutsch. Mai. Ges., April 1876, pp. 97 

 to 148 and 9 woodcuts. 



Dr. Ihering's proposed classification is very briefly shown as 



follows :— 



Vermes. 



Phylum: AMPHINEURA Ihering. 

 Class I. : Aplacophora Ihering. 

 Includes two families: Chcetodermata Ihering (gen. Chceto- 

 derma Lov.) and Neomeniadce Ihering (gen. Neomenia Tullberg). 



Class II. : Placophora Ihering. 

 Includes one family: CJiitonidoe (Fer.) Guild. 



Molluska Cuv. 



ist Phylum: ACEPHALA Cuv. 

 ( =zLameliibrancInata Blv. ) 



2nd Phylum: SOLENOCONCH^ Lac.-Duth. 

 (= Scapliopoda Bronn. ) 



3rd Phylum: ARTHROCOCHLIDES Ihering. 

 {= Gastropoda prosobraiichiata M. Edw. p.) 



Class I. : Chiastoneura Ihering. 

 Order I. ; ZeugobrancJiia Ihering. 

 Families Fissure! I idee Risso, Ua Hot idee Flem., and Pleicroto- 

 maridm D'Orb. 



Order II.: Anisobranchia Ihering. 



Suborder I.: Patelloidea (Docoglossa Trosch. p.) Ihering. 

 Families Tecturidce Gray, Fafellidce Gray, and Lepetidce Gray. 



Suborder 11. : Rhipidoglossa (Trosch. p.) Ihering. 

 Family Trochidce D'Orb. 



Suborder III. : Tsenioglossa (Trosch. p.) Ihering. 



J.C. ii. Sept., 1879 



