On the Early Stages of Terebratulina Septentrionalis
On the Early Stages of Terebratulina Septentrionalis
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They are also much larger than those subsequently formed. They are oval in shape, and within their borders a circular, granulated plug of a reddish yellow color is seen, between which and the outer border of the tubule a clear space is visible. From twelve to fourteen hairs of various lengths, some of them three times as long as the diameter of the pore, spring from the margin of the granulated disk, and radiate in every direction. That these are veritable hairs and not minute tubules in the sh...ell, or any internal markings, I proved in a very sim- ple manner. First I made an exceedingly careful drawing of the tubule, showing exactly the position of each hair, and then brushing the pores slightly with a delicate camel's hair pencil I again made a careful drawing of the same pores, using the same objective, | Wales. The hairs were found in every case to have changed positions, being bent in different direc- tions. Fig. 100, a, represents a drawing of the tubule before brushing, though in this the hairs were bent in handling the specimen, and Fig.
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To quickly assess the difficulty of the text, read a short excerpt:
They are also much larger than those subsequently formed. They are oval in shape, and within their borders a circular, granulated plug of a reddish yellow color is seen, between which and the outer border of the tubule a clear space is visible. From twelve to fourteen hairs of various lengths, some of them three times as long as the diameter of the pore, spring from the margin of the granulated disk, and radiate in every direction. That these are veritable hairs and not minute tubules in the sh...ell, or any internal markings, I proved in a very sim- ple manner. First I made an exceedingly careful drawing of the tubule, showing exactly the position of each hair, and then brushing the pores slightly with a delicate camel's hair pencil I again made a careful drawing of the same pores, using the same objective, | Wales. The hairs were found in every case to have changed positions, being bent in different direc- tions. Fig. 100, a, represents a drawing of the tubule before brushing, though in this the hairs were bent in handling the specimen, and Fig.
What to read after On the Early Stages of Terebratulina Septentrionalis?
You can find similar books in the "Read Also" column, or choose other free books by Morse, Edward Sylvester, 1838-1925 to read onlineMoreLess
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