The Canadian journal of industry, science and art . Fig. 94. Canadian examples are exceedingly numerous ; more especially thosebelonging to O. testudinaria, fig. 90, of the Trenton and higherdivisions of the Lower Silurian series. Pig. 91 represents O. trice- 112 A POPULAR EXPOSITION OF THE naria; j5^. 92, 0. pectinella, and fig. 93, O. lynx, all of commonoccurrence in the Trenton Grroup. O. elegantula of the NiagaraGroup (Upper Silurian) is closely related to O. tesfudinaria, and hasthe general form of fig. 90. 0. Vanuxemi, fig. 94, is a Devonianspecies. The Lower Silurian form, O. lynx, fig.
The Canadian journal of industry, science and art . Fig. 94. Canadian examples are exceedingly numerous ; more especially thosebelonging to O. testudinaria, fig. 90, of the Trenton and higherdivisions of the Lower Silurian series. Pig. 91 represents O. trice- 112 A POPULAR EXPOSITION OF THE naria; j5^. 92, 0. pectinella, and fig. 93, O. lynx, all of commonoccurrence in the Trenton Grroup. O. elegantula of the NiagaraGroup (Upper Silurian) is closely related to O. tesfudinaria, and hasthe general form of fig. 90. 0. Vanuxemi, fig. 94, is a Devonianspecies. The Lower Silurian form, O. lynx, fig. 93, has the generalaspect of a spirifer, but its mesial fold and sinus are marked byseveral plications, a character not exhibited by any of our CanadianSpirifers. It was formerly called Delthyris lynx. StropJiomena:—Shell, concavo-convex ; hinge-line, straight; nointernal supports. This genus ranges from the Silurian to theCarboniferous formation. Canadian examples are very
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Keywords: ., bookcentury1800, bookdecade1850, bookpublishertoron, bookyear1856
