Natural History Illustrations
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— A tentacle with discoidal tip.
Fig. 5. — Abnormal tentacle. The tip is bifurcated and there are two termimal clusters of nematocysts.
Fig. 6. — A tentacle with disk-shaped cluster of nematocysts.
Fig. 7. — A cluster of nematocysts from an unknown region of the body.
Figs. 8, 9. — I am unable to interpret these figures.
18 ANATOMY OF ASTEANGIA.
PLATE VI.
NEMATOCYSTS.
The following quotations from Prof. J. Leidy, op. cit, may serve as an introduction to a study of the figures here given of the ...nematocysts found in Astrangia. He says : " The filiferous capsules (nematocysts) of A. astrceformis are of two principal varieties. The first variety consists of oval or ovoidal cells .05 mm. long by .0155 mm. broad, containing a spirally-wound thread. . . . The second variety consists of smaller cells, those of the tentaculse measuring about .045 mm. by .0067 mm. and those of the white cords .03 mm. by .0112 mm. ; and they contain besides a spirally-wound thread a style extending from one pole to about the centre of the cells.
What to read after Natural History Illustrations?
You can find similar books in the "Read Also" column, or choose other free books by Louis Agassiz to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
— A tentacle with discoidal tip.
Fig. 5. — Abnormal tentacle. The tip is bifurcated and there are two termimal clusters of nematocysts.
Fig. 6. — A tentacle with disk-shaped cluster of nematocysts.
Fig. 7. — A cluster of nematocysts from an unknown region of the body.
Figs. 8, 9. — I am unable to interpret these figures.
18 ANATOMY OF ASTEANGIA.
PLATE VI.
NEMATOCYSTS.
The following quotations from Prof. J. Leidy, op. cit, may serve as an introduction to a study of the figures here given of the ...nematocysts found in Astrangia. He says : " The filiferous capsules (nematocysts) of A. astrceformis are of two principal varieties. The first variety consists of oval or ovoidal cells .05 mm. long by .0155 mm. broad, containing a spirally-wound thread. . . . The second variety consists of smaller cells, those of the tentaculse measuring about .045 mm. by .0067 mm. and those of the white cords .03 mm. by .0112 mm. ; and they contain besides a spirally-wound thread a style extending from one pole to about the centre of the cells.
What to read after Natural History Illustrations?
You can find similar books in the "Read Also" column, or choose other free books by Louis Agassiz to read onlineMoreLess
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