. The Canadian naturalist and geologist. Natural history -- Periodicals. Fig. 24. Fruit of Tetraphis Fig. 25. Splachnum sphaericum, pellueida, peristome of with eight bigemiuate teeth, four teeth. and exserted columella. Arthrodonti, those with jointed teeth, and Nematodonti, those with filamentous teeth. In the Polytricha, also, the top of the colu- mella is dilated into a membrane, closing the mouth of the capsule, and joined to the points of the teeth ; this expansion has leen named the epiphragm or tympanum (fig. 27).. Fig. 26. Bifid tooth from peristome of Fissidens, Fig. 27. Peristome an
. The Canadian naturalist and geologist. Natural history -- Periodicals. Fig. 24. Fruit of Tetraphis Fig. 25. Splachnum sphaericum, pellueida, peristome of with eight bigemiuate teeth, four teeth. and exserted columella. Arthrodonti, those with jointed teeth, and Nematodonti, those with filamentous teeth. In the Polytricha, also, the top of the colu- mella is dilated into a membrane, closing the mouth of the capsule, and joined to the points of the teeth ; this expansion has leen named the epiphragm or tympanum (fig. 27).. Fig. 26. Bifid tooth from peristome of Fissidens, Fig. 27. Peristome and tympanum of Pogonatam 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 Natural History Society of Montreal. Montreal, Dawson
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