. Lessons in botany. Botany. Fig. 96. Young antheridium and oogonium of Vaucheria , , . ,t sessilis, before separation from contents of thread by from a main thread. A a sep um. septum is formed which separates an end portion from the stalk. This end cell is the antheridium. Frequently it is collapsed or empty as shown in fig. 97. The protoplasm in the antheridium forms numerous small oval bodies each with two slender lashes, the cilia. When these are formed the antheridium opens at the end and they. Fig. 97. Vaucheria sessilis, one antheridium between two oogonia. escape. It is after the esca
. Lessons in botany. Botany. Fig. 96. Young antheridium and oogonium of Vaucheria , , . ,t sessilis, before separation from contents of thread by from a main thread. A a sep um. septum is formed which separates an end portion from the stalk. This end cell is the antheridium. Frequently it is collapsed or empty as shown in fig. 97. The protoplasm in the antheridium forms numerous small oval bodies each with two slender lashes, the cilia. When these are formed the antheridium opens at the end and they. Fig. 97. Vaucheria sessilis, one antheridium between two oogonia. escape. It is after the escape of these spermatozoids that the antheridium is collapsed. Each spermatozoid is a male gamete. 209. Oogonium.—The oogonia are short branches also, but they become large and somewhat oval. The septum which separates the protoplasm from that of the main thread is as we see near the junction of the branch with the main thread. The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Atkinson, George Francis, 1854-1918. New York, H. Holt and company
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