. Bulletin - United States National Museum. Science. r^< Fig. 47.—Graptodictya perelegans. a, tangential section, X20, of the type-specimen; b, several zocECiA, X40; c, vertical section, X20; d, transverse section, X20. Richmond group, Clarks- %tlle, Ohio. quite different from the numerously segmented method of growth in ArtJoropora. The Russian specimens referred to the genus include a species very similar in growth and other features to the American genotype, and in addition two cribrose forms—a method of growth which hitherto had not been recognized in the genus. The method of growth in
. Bulletin - United States National Museum. Science. r^< Fig. 47.—Graptodictya perelegans. a, tangential section, X20, of the type-specimen; b, several zocECiA, X40; c, vertical section, X20; d, transverse section, X20. Richmond group, Clarks- %tlle, Ohio. quite different from the numerously segmented method of growth in ArtJoropora. The Russian specimens referred to the genus include a species very similar in growth and other features to the American genotype, and in addition two cribrose forms—a method of growth which hitherto had not been recognized in the genus. The method of growth in the two latter species Graptodictya proava (Eichwald) and G. oUigua,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
