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"Anterior end of body of Branchiostoma. d, chorda dorsalis; e, spinal cord; f, cartilaginous rods; g, eye; h, branchial rods; i, labial cartilage; k, oral cirrhi." — Encyclopedia Britannica, 1893

Brachiostoma

"Anterior end of body of Branchiostoma. d, chorda dorsalis; e, spinal cord; f, cartilaginous rods; g,…

"Skull and Dentition of Dendrohyrax Dorsalis." —The Encyclopedia Britannica, 1903

Dendrohyrax Dorsalis

"Skull and Dentition of Dendrohyrax Dorsalis." —The Encyclopedia Britannica, 1903