Sentence:  In almost all birds, except the carnivorous kinds, the male seems to have more power of development, which appears in their greater height, the strength of their muscles, and in certain excrescences, as <WSD>fleshly</WSD> membranes, spurs, &c. ... 
Meaning of the word marked with <WSD> tags:  Of, relating to or resembling flesh; composed of flesh; having a lot of flesh.