How is Lombard’s smile described?

How is Lombard’s smile described? And he smiled often, his lips curling back from his long white teeth. The narrator frequently describes Lombard’s resemblance to a large and beautiful but dangerous animal, such as a panther, throughout the novel.

And he smiled often, his lips curling back from his long white teeth. The narrator frequently describes Lombard’s resemblance to a large and beautiful but dangerous animal, such as a panther, throughout the novel.