Early mammal classification is controversial. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The earliest known mammal was a tiny, shrewlike ...

Principles of taxonomy -- Formal classification of mammalia -- Review of mammalian classification -- Bibliography -- Index to technical names -- Index to vernacular ...

A REMARK made by Prof. Allen Thomson on this subject in a late number of NATURE induces me again to draw attention to some objections I offered to the placental classification in a review of Prof.

At head of title: Proceedings of the United States National Museum.