Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 640
greater or less abundance, in Deep-seadredgings from almost every region of the globe—a globularchamber with porous walls, and a simple circular aperture that isfrequently replaced by a number of large pores scattered through-out the wall of the sphere. It is maintained by some that Orbulinais… … Globigerina builoides, as seen in three positions. coarsely porous walls, and cohering externally into a more or lessregular turbinoid spire, each turn of which consists of four cham-bers progressively increasing in size. These chambers, whose totalnumber seldom exceeds sixteen, do not communicate…
Microscopy · Biology
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