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Biol Bull 62: 328-338. (June 1932)
© 1932 Marine Biological Laboratory
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THE LIFE HISTORY OF PARORCHIS AVITUS (LINTON) A TREMATODE FROM THE CLOACA OF THE GULL

HORACE W. STUNKARD 1 and RAYMOND M. CABLE 1

1 From New York University and the Marine Biological Laboratory, Woods Hole, Mass.

The life history of Parorchis avitus has been experimentally traced. The cercariæ occur in the marine snails, Urosapinx cinereus and Thais (Purpura) lapilius. Adults have been obtained from the cloaca of the common tern, Sterna hirundo, and the roseate tern, Sterna dougalli, after feeding the young birds with encysted larvæ.

It has been shown that a specific secondary intermediate host is not essential for the completion of the life history; only a means of transference is necessary.

Additional morphological differences between Parorchis avitus and Parorchis acanthus are described.






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Copyright © 1932 by the Marine Biological Laboratory.