. A manual of zoology. Zoology. MOLLUSCA. Sub Order II. PTEROPODA. Pelagic forms which in most points of structure agree with the Teetibranchs. The head and usually eyes and tentacles are lacking, while the fins (in reality greatly developed para- podia) are highly characteristic, giving the name ' wing-footed' to these forms. Like the Teetibranchs they are hermaphroditic, orthoneurous, have a single ctenidium and a posterior auricle. The THECASOMATA. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appe
. A manual of zoology. Zoology. MOLLUSCA. Sub Order II. PTEROPODA. Pelagic forms which in most points of structure agree with the Teetibranchs. The head and usually eyes and tentacles are lacking, while the fins (in reality greatly developed para- podia) are highly characteristic, giving the name ' wing-footed' to these forms. Like the Teetibranchs they are hermaphroditic, orthoneurous, have a single ctenidium and a posterior auricle. The THECASOMATA. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
