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It would thus be correct to say--that each cell is furnished with two lateral processes, each of which in the fully developed state consists of three distinct compartments--one superior, a cup or spine: a middle one, which is the avicularium: and an inferior; and it would appear that one or more of these elementary compartments of the lateral process may be more developed than the next, or sometimes entirely aborted.

And what is worthy of remark, these terminal ovicells always have a sessile avicularium on the summit.

Its peculiar characteristics are the perforated and striated scutiform area on the front of the cell and the perforated, or apparently perforated pyramidal lateral processes above each avicularium; these processes are much developed, and give the cell the form of a broad inverted shear-head.

The prehensile part of the avicularium itself small, seated in a deep notch below the acuminate summit; lateral area large and well defined.

It also wants the raised bands which in C. amphora pass from the sides of the mouth to the apex of the avicularium in front.