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"Third cervical vertebra of Woodpecker (Picus viridis). (Viewed anteriorly.) Ft, vertebrarterial foramen; Ob, upper arch ; Pa, articular process; Psi, haemal spine ; Pt, Pt, the two bars of the transverse process, shewn on one side ancylosed with the cervical rib (R); Sa articular surface of centrum. (From Wieersheim.) A. H. Evans, 1900

The Diagram of a Third Cervical Vertebra of a Woodpecker

"Third cervical vertebra of Woodpecker (Picus viridis). (Viewed anteriorly.) Ft, vertebrarterial foramen;…