Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 908
s 1 finds inthe centre of these prolongations an axial fibre which can be tracedbackwards to the nerve-cells of the mantle ; at the distal end is a.terminal cell which is connected by a fibril with the axial fibre, andis covered externally by a transparent chitinous layer ; save for theabsence (or… … Fig. 644. Fig. 645. Fig. 646. Fig. 644.—Horizontal section of shell of Terebratula bullata (fossil, Oolite).Fig. 645. „ „ Megerlia lima (fossil, Chalk). Fig. 646. „ „ Sjjiriferina rostrata (Triassic). ■six recent species, but which contains a very large proportion offossil Brachiopods, these canals…
Microscopy
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