. Fresh-water biology. Freshwater biology. ^^ (32) Adhesive disc oval, composed of three rows of alveoli 34 34 (35) Mouth subterminal, not surrounded by buccal disc. Cotylaspis Leidy 1857. Ventral shield much as in Aspidogaster, save that the alveoU are in three longitudinal rows, the central alveoli being elongated transversely. Marginal sense organs present, also two eyes. Ovary dextral, smaller than single testis m posterior end. Ova not numerous, large. Of several species known, Cotylaspis insignis Leidy 1837, is most frequent. It is adherent to surface of host in angle between inner gill
. Fresh-water biology. Freshwater biology. ^^ (32) Adhesive disc oval, composed of three rows of alveoli 34 34 (35) Mouth subterminal, not surrounded by buccal disc. Cotylaspis Leidy 1857. Ventral shield much as in Aspidogaster, save that the alveoU are in three longitudinal rows, the central alveoli being elongated transversely. Marginal sense organs present, also two eyes. Ovary dextral, smaller than single testis m posterior end. Ova not numerous, large. Of several species known, Cotylaspis insignis Leidy 1837, is most frequent. It is adherent to surface of host in angle between inner gill and visceral mass (Kelly); or branchial cavity (Leidy) of many species of Unionidae: Havana, 111.; Grand Rapids, Mich.; Lake Chatauqua, N. Y.; Cedar River, la.; Schuylkill River, Penn. Kelly examined over 1600 individuals of 44 species which belong in 24 separate host species and found 18 per cent infected. The number in a single host is small. Representative American species. Cotylaspis cokeri Barker and Parsons C. cokeri Barker and Malacoctemmys lesueurii. Parsons occurs in the intestine of Fig. 66a. Cotylaspis cokeri X30. a. Ventral view of sucking disk Xis-. 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 Ward, Henry Baldwin, 1865-1945; Whipple, George Chandler, 1866-1924. joint author. New York, John Wiley & sons, inc. ; [etc. ,etc. ]
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
