Chromatophores in Relation to Genetic and Specific Distinctions

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Abstract
A limited comparative study of chromatophores of fish indicates that cell types of closely related spp. are more likely to be similar to each other than are those of more widely separated spp. Certain cell types follow the mendelian distr. of genes. The limits of distr. of a cell type may be less or even greater than the sp. Pigments such as melanins or carotenoids probably vary least; cell types are more numerous and macroscopic color patterns show the greatest diversity. The forms studied and reviewed are in part tropical fresh-water aquarium fish and in part marine fish which were studied at the New York Aquarium.