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Show 648 MR. W. F. R. WELDON ON THE [Dec. 18, In the leg the agreement is not quite so close, the Flamingo having many muscular features of its own ; but in those points in Fig. 3. Gastrocnemius and connexions: Ba, in Leptoptilus, ~Bb, in Phoenicopterus, Be, in the Duck. a, inner, b, middle, c, outer head of gastrocnemius; s.t, semitendinosus ; a.s.t., its accessorius. In the Duck, Bi, biceps. which it does resemble other forms, it tends much more to the Ciconine than to the Anserine type. The sartorius is peculiar in being split up into three distinct por- |