. Annual report. New York State Museum; Science; Science. i6o NEW YORK STATE MUSEUM discriminately over the coral at its various levels of growth. How well it struggled to maintain itself is indicated by the presence of fully 30 individuals on a surface of this coral 2 inches square. The single specimen of this species observed is from the Middle Devonic Cedar Valley beds at Iowa City, Iowa. Worms and Sponges We find in more than a single instance among the fossil hexac- tinellid sponges of the family Dictyospongidae evidences of worm tubes attached to the inner wall or cloaca of the sponge an
. Annual report. New York State Museum; Science; Science. i6o NEW YORK STATE MUSEUM discriminately over the coral at its various levels of growth. How well it struggled to maintain itself is indicated by the presence of fully 30 individuals on a surface of this coral 2 inches square. The single specimen of this species observed is from the Middle Devonic Cedar Valley beds at Iowa City, Iowa. Worms and Sponges We find in more than a single instance among the fossil hexac- tinellid sponges of the family Dictyospongidae evidences of worm tubes attached to the inner wall or cloaca of the sponge and living in a condition of commensalism. Such worms have been observed in the species Hydnoceras tuberosum var. glos- s e m a and Prismodictya telum Hall & Clarke, from the sponge plantations of the Upper Devonic in western New York [pi. 5, fig. 1, 2]. In a considerable number of individuals of the latter species from the same locality nearly all showed the presence. of the annelid commensal and as the surface of the impression left in the sands by the worm tube is in all cases crossed by the reticu- lated skeleton of the sponge it is inferred that the position of the. 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 New York State Museum. Albany : University of the State of New York
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
