...A pairof lateral vocal sacs behind the angles of the jaws and the well-developeddermal glands were used by Duellman (1956) to distinguishPhrynohyas from Hyla... 
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...From undue pressure, and that most frequently caused byviolent action and straining of the tendons, or often from somepredisposition about the horse, these little sacs are injured...
Richard L. Allen 「Domestic Animals」
...Racemose: like a bunch of grapes: applied to ovarieswhen they form bunches or sacs...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Vesicles: little sacs, bladders or cysts: applied toextensible organs producing odors or secretions, as in somebeetles and caterpillars...
John. B. Smith 「Explanation of Terms Used in Entomology」
...On the feeding grounds, I found several of these sacs discarded near the moth wings...
Glen E. Woolfenden 「Comparative Breeding Behavior of Ammospiza caudacuta and A. maritima」
...I did not see sparrows of either species swallow fecal sacs...
Glen E. Woolfenden 「Comparative Breeding Behavior of Ammospiza caudacuta and A. maritima」
...The iris is golden, and the vocal sacs are darkolive brown...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...In these cases a vesicular fold appears in thegullet of the embryo at an early stage, and gradually takes the shape of twospacious sacs, which are afterwards filled with air...
Ernst Haeckel 「The Evolution of Man」
...The sexually mature lancelet has, on the right andleft of the gut, a series of metamerous sacs, which are filled with ova in thefemale and sperm in the male...
Ernst Haeckel 「The Evolution of Man」
...Both sacs lie on the inner wall ofthe atrium, and have no special outlets...
Ernst Haeckel 「The Evolution of Man」
...The originally short connection of the pulmonary sacs with the head-gutextends into a long, thin tube...
Ernst Haeckel 「The Evolution of Man」
...The liver appears first in the shape oftwo small sacs, that are found to the right and left immediately behind thestomach (Figs...
Ernst Haeckel 「The Evolution of Man」
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