| Series of inarticulated Series of articulated | Animals. Animals. | ----------^------------ ---------^----------- | Infusoria | | | | | ----^---- | | Polypes | Apathetic Animals. < | | | ----^---- | | | | | | | Radiarii --^--- | Ascidiens Vermes | | | | | ----^---- | | | | | | | Epizoaria -------------------------------------------------------------------------------- | ----^---- | ----^---- | Acephala | | | | | Insecta | ----^--- | ---^--- | Mollusca ------^-- | | Sentient Animals. < Annelides | Arachnides | | | Crustacea | ----^---- | | | Cirrhipeda -------------------------------------------------------------------------------- | Pisces Intelligent < Reptilia Animals. | Aves | Mammalia]