Mammalia in the 10th edition of Systema Naturae

[1] The following explanations are based on William Turton's translations who rearranged and corrected earlier editions published by Johann Friedrich Gmelin, Johan Christian Fabricius and Carl Ludwig Willdenow:[2] Animals that suckle their young by means of lactiferous teats.

[3] Primates have four cutting upper parallel fore-teeth, except in some bat species which have two or none; solitary tusks in each jaw, one on each side; two pectoral teats; two feet and hands; flattened, oval nails; and they eat fruits.

[2] Glires have two cutting fore-teeth in each jaw, but no tusks, feet with claws formed for running and bounding, and eat bark, roots, and vegetables, which they gnaw.

[2] Pecora do not have upper, not many lower cutting fore-teeth, hoofed, cloven feet, and feed on herbs which they pluck, chewing the cud; four stomachs, a paunch for macerating and ruminating food, a bonnet for reticulating and receiving it, an omasus or maniplies of numerous folds for digesting it, and an abomasus or caille, fasciate, for giving it acescency and preventing putrefaction.

[2] Cete have some cartilaginous, some bony teeth, no nostrils but a fistulous opening in the anterior and upper part of the head, pectoral fins instead of feet, horizontal, flattened tails, no claws, live in the ocean, and feed on mollusca and fish.