1898-190-2. No. 3r>.] SUMMARY OF GEOLOGICAL RESULTS. 15 



Archimedes sp., B. 

 Polypora martis Fischer, B; S.V. 

 Polypora binrmica Key.s , B. 

 Polypora pustiilata Todla, B. 

 Polypora orbicribata Keys., B; S.V. 

 Polypora micropora Stuck., B. 

 Phyllopora ct'. borealis Stuck., B; S.V. 

 Procludus boKvieiisis d'Orb., B. 

 Productus inflatus McChes.\., B; S.V. 

 Produdus Stuckenbergi Krotow, B. 

 Productus tartaricus Tschern., B. 

 Productus pseudoaculeatus Krot., B. 

 Produdus tastubensis Tschern , B. 

 ^Productus Fratni Tschern., B. 

 Productus irginae Stuck., B; S.V. 

 Productus Humboldti d'Orb., B. 

 Productus Aagaardi Toula, B; S.V. 

 Produdus simensis Tschern., B. 

 Productus Konincki Vern., B; S.V. 

 Produdus cancriniformis Tschern., B. 

 Productus Weyprechti Toula, B. 

 Productus porredus Kut., B. 

 Productus timanicus Stuck., B. 

 Marginifera involuta Tschern., S. V. 



Marginifera typica Waag. var. septentrionalis Tschern., B. 

 Marginifera Clarkei Tschern., B. 

 Derbyia grandis Waag., B. 

 Beticularia lineata Mart., B. 

 Beticularia guadalupensis Shum , B. 

 *Spirifer Scheii Tschern., B. 

 Spirifer condor d'Orb., B. 

 Spirifer fasciger Keyserl., B. 

 Spirifer Marcoui V^aag., B. 

 Spirifer tastubensis Tschenr., B 

 Spirifer lyra Kut., B. 

 Spirifer Nikitini T.=chern., B. 

 Spirife-rella Saranae Vern , B. 

 Spiriferella Keilhavi v. Buch., B. 

 Spiriferella artiensis Stock., B. 

 Spiriferella Parryana Toula, B : S.V. 

 Spiriferella Draschei Toula, S. V. 

 Spiriferella sp., B. 

 Spiriferina cristata Schl., B. 

 Camaraphoria Kutorgae Tschern., B. 

 Camaraphoria mutabilis Tschern., B. 

 Bhynchopora Nikitini Tschern., B ; S. V. 

 *Notothyris polaris Tschern., B. 

 melasma Moelleri Tschern., B. 

 Aviculopeden (Beltopeden ?) Bouei Keyserl. non Vern., B. 



Of 55 forms, which are specifically determined, no less than 42 are 

 also known from the Schwagerina-hovizon of the Ural and the Timan, 

 thus very nicely giving the age of the limestone as high Upper 

 Carboniferous according to the Russian stratigraphic system ; and 



