"Spherule" Quotes from Famous Books
 ... all in the gland which surmounts the tentacle. To incite movement or other action, it is necessary that the gland itself should be reached. Anything laid on the surface of the viscid drop, the spherule of clear, glairy liquid which it secretes, produces no effect unless it sinks through to the gland; or unless the substance is soluble and reaches it in solution, which, in the case of certain substances, has the same effect. But the glands themselves do ...
— Darwiniana - Essays and Reviews Pertaining to Darwinism • Asa Gray |
