higher animals, which were only created when the earth was in a state suitable to receive them. But when the surface of the earth was still more developed God created man. His last and greatest work; and there can be no doubt that God in His wisdom caused all these changes to precede the creation of man, that he might lack nothing to confer happiness on him, nor objects to exercise his faculties upon. * * * * * Animals are divided into two great natural families, the Invertebrate and the Vertebrate, the former having neither spine nor internal skeleton, the latter having both. The Invertebrate animals are divided into the following sub-families, classes, and orders by Dr. William Carpenter. Sub-family 1.--RADIATA, having Four classes. 1. Infusoria. 2. Entozoa. {Hydroida } 3. Zoophyta. {Asteroida } 4 Orders. {Helianthoida } {Ascidioda } 4. Radiaria. {Acalephæ } 2 Orders. {Echinodermata} Sub-family 2.--ARTICULATA, having Five classes. 1. Annellata. 2. Cerripeda. 3. Crustacea. {Coleoptera } {Orthoptera } {Neuroptera } {Hymenoptera } 4. Insecta. {Strepsiptera} 9 Orders. {Lepidoptera } {Hemiptera } {Diptera } {Aptera } 5. Arachnida. Sub-family 3.--MOLLUSCA, having Six classes. ACEPHALA, or Headless. 1. Tunicata. 2. Brachiopoda. 3. Lamellibranchiata. ENCEPHALA, Having a Head. 4. Pteropoda. 5. Gasteropoda. 6. Cephalopoda. The Infusoria, the first class of the Radiata, comprise all those microscopic organisms called "Protozoa;" they consist of a membranous cell with fluid contents, and are very nearly allied to the Protophytes or lowest vegetable existences. It is still a matter of discussion amongst physiologists and microscopists as to which kingdom shall claim certain of them, but, according to Dr. Carpenter, it appears that the vegetable cell-beings have two envelopes, the inner one albuminous and the outer one cellulose or starchy, and the following passage occurs in his treatise on the Microscope (which should be in the hands of all enquiring minds):--