Preliminary notice of a few species of EchiniPublished in Bulletin of the Museum of Comparative Zoology, Harvard, in 1872, in volume 3, pages 55-58The fossil cephalopods of the Museum of Comparative ZoologyPublished in Bulletin of The Museum of Comparative Zoology, in 1872, in volume 3, pages 59-111
The fossil cephalopods of the Museum of Comparative ZoologyPublished in Bulletin of The Museum of Comparative Zoology, in 1872, in volume 3, pages 59-111