Black and white diagram engraving of species and parts of whales. Depicted are: (1) vertebrae of a Balaenoptera Rorqual; (2) baleens of a Balaenoptera Rorqual. Lettered with captions and "1. Vert̬bres d'une Baleinopt̬re Rorqual. 2. Fanons d'une Baleinopt̬re Rorquale. Pl. 7. Page 130."
