Fam. { 23. Felidæ Cats, Lion, &c. { 24. Cryptoproctidæ Cryptoprocta. { Æluroidea { 25. Viverridæ Civets. { { 26. Protelidæ Aard-wolf. { { 27. Hyænidæ Hyænas. { Fissipedia { Cynoidea 28. Canidæ Dogs, Foxes, &c. { { {29. Mustelidæ Weasels. { {30. Procyonidæ Racoons. { Arctoidea {31. Æluridæ Pandas. {32. Ursidæ Bears. {33. Otariidæ Eared Seals. Pinnipedia {34. Trichechidæ Walrus. {35. Phocidæ Seals. The Cetacea is one of those orders the classification of which is very unsettled. The animals comprising it are so huge, and there is so much difficulty in preserving them, that only a very few species are known with anything like completeness. A considerable number of genera and species have been described or indicated; but as many of these are founded on imperfect specimens of perhaps a single individual, it is not to be wondered at that those few naturalists who occupy themselves with the study of these large animals, cannot agree as to the proper mode of grouping them into natural families. They are, however, of but little importance to us, as almost all the species inhabit the ocean, and of only a few of them can it be said that anything is accurately known of their distribution. I therefore consider it best to follow Professor Carus, who makes a smaller number of families; but I give also the arrangement of Dr. Gray in his British Museum catalogue of whales and seals, as modified subsequently in the _Proceedings of Zoological Society_, 1870, p. 772. The Zeuglodontidæ, a family of extinct tertiary whales, are classed by Professors Owen and Carus between Cetacea and Sirenia, while Professor Huxley considers them to have been carnivorous and allied to the seals. {89}Order--CETACEA. Fam. (CARUS). Fam. (GRAY). Sub-order I.-- { Balænidæ 36. Balænidæ. Mystaceti. { Balænopteridæ 37. Balænopteridæ.