Fig. 3 in Georg Bojung "Scato" Lantzius-Beninga and his contributions on the anatomy of moss capsules: a transliteration from the original German texts

Fig. 3. Half of a longitudinal section of a mature capsule of Gymnostomum pyriforme; it is to note that the loose tissue at y is the lower part of the columella, which is, in a younger state, strongly tightened, slackens more, as presented, when the spore sac is more expanded, and is totally compressed by the complete development of the spores. See the additional remarks in the text. Magnification x 135.