The Cambridge natural history . Fig. 330.—Spirifera drudn. (Carboniferous Lime-stone. ) Showing brachial spires. 502 FOSSIL BRACHIOPODA xars, which are rarely ilivisihle into anterior and posterior pairs. In Lei^taena (Fig. 334) the occhisor scars {a) in the ventral.

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895