The Shipley Collection of Scientific Papers, Volume 1141880 |
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Página 190
... gland . It is possible that the cavity of this diverticulum is in communication with the lumen of the coxal gland , in which case it is a portion of the cœlome . I have not been able to satisfy myself on this point , however . III . The ...
... gland . It is possible that the cavity of this diverticulum is in communication with the lumen of the coxal gland , in which case it is a portion of the cœlome . I have not been able to satisfy myself on this point , however . III . The ...
Página 52
... - gards the trachea , including the lungs of all " Tracheates , " as having their origin in dermal glands which have gradually been modified for respiratory purposes . He also states that 52 TUFTS COLLEGE STUDIES , No. 2 .
... - gards the trachea , including the lungs of all " Tracheates , " as having their origin in dermal glands which have gradually been modified for respiratory purposes . He also states that 52 TUFTS COLLEGE STUDIES , No. 2 .
Página 30
... glands . They are possessed of a wonderful mobility , and can be widely separated , or energetically rubbed upon each other with a rotary motion at the will of the animal . Their separation discloses a third and smaller pair of ...
... glands . They are possessed of a wonderful mobility , and can be widely separated , or energetically rubbed upon each other with a rotary motion at the will of the animal . Their separation discloses a third and smaller pair of ...
Página 31
... glands ( fig . 3 ) debouch- ing on the anterior and intermediate spinnerets re- spectively on the inner side . There are three pairs of Aggregate glands , their three outlets on each side being situate upon the inner surface of the ...
... glands ( fig . 3 ) debouch- ing on the anterior and intermediate spinnerets re- spectively on the inner side . There are three pairs of Aggregate glands , their three outlets on each side being situate upon the inner surface of the ...
Página 33
... glands , and that it may on occasion be strenghened by con- tributions from the Piriform and Acinate glands opening upon the anterior and posterior spinnerets respectively . It was next attempted to apply the same direct method to VOL ...
... glands , and that it may on occasion be strenghened by con- tributions from the Piriform and Acinate glands opening upon the anterior and posterior spinnerets respectively . It was next attempted to apply the same direct method to VOL ...
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Página 61 - ... illustration, which we have only to go into the garden to find. There we may see in abundance what is now upon the screen — the webs of those beautiful geometrical spiders. The radial threads are smooth, like the one you saw a few minutes ago, but the threads that go round and round, are beaded. The spider draws these webs slowly, and at the same time pours upon them a liquid, and still further to obtain the effect of launching a liquid cylinder in space, he, or rather she, pulls it out like...