The anatomical record . Figs. 7 iiiul .s Left and ii^;lii of .son those of the other corresponding phalanfjes liut nevertheless in hunre .• it is a separate bone with a distinct diajihysisand epiphysis, articular surfaces and base and head. Besidesshowing the .same peculiarities in regard to the extra i)halanx,the metacarpal of this thumb shows a double epiphysis (figs. Sand 11). In all of the cases of three-jointed thumbs reported, hereto-fore, the middle i)halanx is con>idered the extra phalanx. iiYri;iuiiAi,A.\(;isM 121 Pfitziior, !)() who has done more work than anyone
The anatomical record . Figs. 7 iiiul .s Left and ii^;lii of .son those of the other corresponding phalanfjes liut nevertheless in hunre .• it is a separate bone with a distinct diajihysisand epiphysis, articular surfaces and base and head. Besidesshowing the .same peculiarities in regard to the extra i)halanx,the metacarpal of this thumb shows a double epiphysis (figs. Sand 11). In all of the cases of three-jointed thumbs reported, hereto-fore, the middle i)halanx is con>idered the extra phalanx. iiYri;iuiiAi,A.\(;isM 121 Pfitziior, !)() who has done more work than anyone else on the(Icvclopiiicnt of tho oxtreinitios. has roportod several rases oftlircc-joiiitcd tiiiinilis, hut in all of these cases the three jointswere only temporary for the extra, middle phalanx later fusedwith the end phalanx to form one bone. In no ease did Pfitznerfind an extra jjhalanx that hail a distinct epiphysis, articularsurface, head, and which in general had the shajje of a normallydeveloped phalanx as in
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906
