Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 685
disposition of the larger canals and ofthe smaller pores with which they communicate. In the ordinarySponge, the fibrous skeleton is almost entirely destitute of spicules;the absence of which, in fact, is one important condition of thatflexibility and compressibility on which its uses depend.…
Microscopy · Biology
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