Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 778
is that the number of chambers in each turn is verysmall; thus in Globigerina (figs. 20, 2i, Plate XVII) there areusually only four : and in Valvulina the regular number is onlythree. Thus we are led to the biserial arrangement of the chambers,which is characteristic of the textularian group (fig.… … Fig. 549.—Discorbina globularis (Bosalina varzans, Schultze),with its pseudopodia extended. chamber of its own side, as will be understood by reference to fig.564, A, which shows a cast of the sarcode-body of the animal. Onthe other hand, we tind in the nautiloid spire a tendency to pass(by a…
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