...Valve, (1) a membranous fold which allows the blood, or other fluids, to flowin only one direction; (2) one of the two parts of the shell of a bivalve... 
Worrallo Whitney 「A Guide for the Study of Animals」
...Bill slightly compressed, not covered with a membranous skin; edges ofthe mandibles unarmed, or but slightly toothed; wings short; legs placedfar behind; tarsi very much compressed; toes four...
Rev. C. A. Johns 「British Birds in their Haunts」
...Penis: the flexible, membranous, intromittent organ ofthe male...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Praeputium: the external membranous covering of penis:specifically a spherical muscular mass at base of penis in someOrthoptera...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Pulmonarium: the membranous connection of the plates orscutes of the abdominal rings: = connexivum...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Tarsal lobes: membranous appendages arising from theunderside of the tarsal joints in some Coleoptera...
John. B. Smith 「Explanation of Terms Used in Entomology」
...These two appendages are able, by means of a mechanismrecalling, on a smaller scale, that of the Snail's horns, to withdrawinto themselves, as a result of the membranous character of theirbase...
Jean Henri Fabre Alexander Teixeira de Mattos 「The Glow-Worm and Other Beetles」
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