. Bulletin - United States National Museum. Science. 150 BULLETIN 140, UNITED STATES NATIONAL MUSEUM leaf-like valves. Eggs oval, 55/*, long by 45/x wide, with thick shells of mosaic appearance. Life history.—Unknown. Distribution.—South America (British Guiana (Georgetown)). CONTRA CAECUM ENGONIUM Baylis and Daubney, 1922 Host.—Ciconia. nigra. Location.—Not given. Morphology.—C ontracaecum (p. 146) : Head constricted from body. Dorsal lip (fig. 219a) rounded anteriorly and with a pair of double papillae situated near the anterior edge. Pulp follows shape of lip but indented anteriorly; a pair
. Bulletin - United States National Museum. Science. 150 BULLETIN 140, UNITED STATES NATIONAL MUSEUM leaf-like valves. Eggs oval, 55/*, long by 45/x wide, with thick shells of mosaic appearance. Life history.—Unknown. Distribution.—South America (British Guiana (Georgetown)). CONTRA CAECUM ENGONIUM Baylis and Daubney, 1922 Host.—Ciconia. nigra. Location.—Not given. Morphology.—C ontracaecum (p. 146) : Head constricted from body. Dorsal lip (fig. 219a) rounded anteriorly and with a pair of double papillae situated near the anterior edge. Pulp follows shape of lip but indented anteriorly; a pair of flattened processes project anteriorly and laterally like 2 horns. Male 13 mm. long by 570/a wide. Muscular esophagus mm. long, ventriculus 140/x long; posteriorly directed appendix 700/t long. 0-//77/77 ^ o/mm Fig. 219.—Coxtracaecum engoxium. a, Head; b, male tail. After Basiis and Daubney., 1922 by 150/m wide. Intestinal cecum broad, reaching to within 690//. of head end. Cloacal aperture 125/a from caudal extremity. Ten pairs of postanal papillae (fig. 219&), 4 of them being latero-ventral and the other 6 lateral and pedunculated. No preanal papillae de- scribed. Spicules equal, mm. long by 22/x, wide. Female unknown. Life his'tory.—Unknown. Distribution.—Asia (India). CONTRACAECUM HALIAETI Baylis and Daubney, 1923 Synonym.—Ascaris aquillae Smith, Fox, and White, 1908. not Ascaris aquilae Gmelin, 1790. Hosts.—Haliaetus Uitcocephnlus and H. leucogaster. Location.—Intestine. Morphology.—Contracaecum (p. 146) : Cuticle transversely striated. No lateral alae. Three thick lips (figs. 220 and 221),. 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 Institu
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