Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 812
opment in the tropics, where itsdiameter sometimes reaches one-fourth of an inch. The shell is aflattened nautiloid spire, the breadth of whose earlier convolutionsincreases in a regular progression, but of which the last convolution(in full-grown specimens) usually flattens itself out like that… … Fig. 571.—Calcaritia laid open to show its internal structure : a, chamberedportion; b, intermediate skeleton; c, one of the radiating prolongationsproceeding from it, with extensions of the canal-system. •each convolution by a peculiar band, a, termed the marginal cord.This cord, instead of being…
Microscopy
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