(London, Taylor and Francis, 1872). 4to. No wrappers as extracted from "Philosophical Transactions", 1871. Vol. 161- Part II. Pp. 213-266, textillustr. a. 4 lithographed plates. Clean and fine.
First appearance of a classical paper in which Owen describes the teeth and mandible of the marsupial carnivore, Thylacoleo carnifex, Owen, a species that Owen himself described for the first time in 1860.