. Fresh-water biology. Freshwater biology. 384 FRESH-WATER BIOLOGY anterior to center. Vitellaria in seven symmetrical Kroups, marginal in anterior region. Testes symmetrical. Ovary in front, strongly lobed. Coils of uterus irregular, mostly lateral in posterior half of body. Eggs very small. Representative American species Collyridum colei Ward. The single European species, formerly known as Monostoma faba, was reported for North America as the cause of an epidemic among sparrows at Madison, Wisconsin. The Hfe history is unknown; the supposition that avian insect para- sites act as the interm
. Fresh-water biology. Freshwater biology. 384 FRESH-WATER BIOLOGY anterior to center. Vitellaria in seven symmetrical Kroups, marginal in anterior region. Testes symmetrical. Ovary in front, strongly lobed. Coils of uterus irregular, mostly lateral in posterior half of body. Eggs very small. Representative American species Collyridum colei Ward. The single European species, formerly known as Monostoma faba, was reported for North America as the cause of an epidemic among sparrows at Madison, Wisconsin. The Hfe history is unknown; the supposition that avian insect para- sites act as the intermediate host is extremely improbable. It attacks only young sparrows and infected birds are found only during or just after a wet period (Cole). The parasite has been found again in ISoston, Mass. These specimens differ clearly from the European form in niunerous minor details, such as ovary, yolk glands, dermal spines, etc., and demand recognition as a distinct species under the name given here. Fig. 667. Collyridum colei. X 9. Detail of surface. X 105. (Original.). 45 (38) With elongate tubular testes and vitellaria. Family Heronimidae Ward 46 Moderate sized monostomes with thick, elongate, soft body somewhat flattened, tapering both, towards pointed anterior and bluntly rounded posterior end. Skin smooth. Oral sucker weak, pharynx large, esophagus short, ceca simple, extending to but not united at posterior end. Vitellaria compact, tubular, shaped like inverted V. Uterus in four longitudinal re- gions. Genital pore ventral to oral sucker near anterior tip. Testes tubular, lobed or with short branches, united into V-shaped organ with apex anteriad. Copulatory apparatus poorly developed. Lungs of reptiles. Northern North America. Two genera imperfectly known which may prove to belong in a single genus. 46 (47) Vitellaria extend only half way Seminal receptacle present. from ovary, to posterior end. Heronimus MacCallum. 1902,. Please note that these images are extracted from sca
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
