Elementary botany . cavities sunk in thetissue of the thallus. There is here no illustration of the antheridium of thisriccia, but fig. 259 represents an antheridium of another liverwort, and thereis not a great difference between the two kinds. Each one of those little rect-angular sperm mother cells in the antheridium changes into a swiftly movingbody like a little club with two long lashes attached to the smaller end Bythe violent lashing of these organs the spermatozoid is moved through the water,or moisture which is on the surface of the thallus. It moves through the canalof the archegoni
Elementary botany . cavities sunk in thetissue of the thallus. There is here no illustration of the antheridium of thisriccia, but fig. 259 represents an antheridium of another liverwort, and thereis not a great difference between the two kinds. Each one of those little rect-angular sperm mother cells in the antheridium changes into a swiftly movingbody like a little club with two long lashes attached to the smaller end Bythe violent lashing of these organs the spermatozoid is moved through the water,or moisture which is on the surface of the thallus. It moves through the canalof the archegonium neck and into the egg, where it fuses with the nucleus ofthe egg, and thus fertilization is effected. 224 MORPHOLOG V. 479. Embryo.—In the plants which we have selected thus far for study,the egg, immediately after fecundation, we recollect, passed into a restingstate, and was enclosed by a thick protecting wall. But in riccia, and in theother plants of the group which we are now studying, this is not the
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