Sentence:  On the whole, then, the bones of the pectoral arch in "Dendrocygna" — if we may judge from the two North American species of the genus — are more anatine than they are either anserine or <WSD>cygnine</WSD>. 
Meaning of the word marked with <WSD> tags:  Of, concerning, pertaining to, resembling, or having the characteristics of a swan or swans.