‘I Cefalopodi’ is hosted by the Biodiversity Heritage Library on behalf of the Smithsonian Institution. The author of the magnificent color and b/w plates is Comingio Merculiano (1845-1915), a professional watercolor painter hired in 1885 by prof. Anton Dohrn as in-house illustrator for the Naples Zoological Station.
The Biodiversity Heritage Library blog featured ‘I Cefalopodi’ in its Book of the Week. You can see more from ‘I Cefalopodi’ here, and even download the images [89.2 MB]. Be sure to check out the entire collection of illustrations from this work in Flickr.