...—When wings are folded, it will be helpful to remember thatthickened fore or cover wings always have membranous wings folded beneaththem... 
Worrallo Whitney 「A Guide for the Study of Animals」
...
Per i car' di um, a membranous bag surrounding the heart...
Worrallo Whitney 「A Guide for the Study of Animals」
...At thebottom of this veil, but on the dorsal side, are placedthe jaws, consisting of a pair of curved, unjointed, butfree mallei, with a membranous process beneath each...
Henry J. Slack 「Marvels of Pond-life」
...In severe cases membranous (croupous) deposits are found in thethroat...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...After leaving the funnel the egg passes into a narrow part of theoviduct, called the isthmus, where it receives the membranous coveringswhich are found just inside the shell...
John H. Robinson 「Our Domestic Birds」
...Fenestra: a window; a transparent glassy spot or mark;a pellucid mark in a vein: a small, pale, membranous area at thebase of the antenna in roaches...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Tetraptera: a term proposed for all insects with fournaked, membranous reticulated wings...
John. B. Smith 「Explanation of Terms Used in Entomology」
...The membranous cymbal and the steel cricket are analogous instruments...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...The anomalure is asquirrel with a membranous skin resembling to some extentthat of the flying squirrels and used by it for the same purpose...
Various 「Natural History in Anecdote」
...177: Rudiment of flying membrane, membranous fold between foreand hind leg...
Ernst Haeckel 「The Evolution of Man」
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