4 University of Michigan 



Description: This distome has a body which is elongated and 

 slightly flattened ; length i mm., width .3 mm. A short esophagus 

 and pharynx are present. The coeca branch directly from the 

 pharynx and extend to the posterior end of the body. 



The genital pore is median and immediately anterior to the 

 ventral sucker. The genital bursa is elongated, slender, and 

 cylindrical, it lies dorsally and extends posterior to the margin 

 of the ventral sucker. The testes are posterior to the ovary, 

 they are oval in form and are situated obliquely. 



The ovary is found slightly posterior and to the left of the 

 ventral sucker. It is oval and is about one-half the diameter of a 

 testis. The uterus coils extensively, winding between the testes, 

 to the posterior end of body, then anteriorly to the genital pore. 

 Many eggs are present in the uterus. 



The vitelline glands extend from the region of the pharynx 

 to the posterior testis. They are arranged in a line of single 

 follicles lateral to coeca and do not extend across the body. 



This species is similar to Plagiorchis notabilis Nicoll, found in 

 the intestine of Anlkus obscurus (rock pipit). The genus Plagior- 

 chis has not been reported from fishes. It is found chiefly in 

 birds. Perhaps the life-cycle may alternate between birds and 

 fishes; this remains for further research. 



Bibliography 



Braun, M., Bronn's Klassen und Ordnungen der Thierreichs. Bd. 4, Vermes, 



Lief. 36-37 (1900), p. 1 149. 

 Mrazek, a., tjber die larvae von Carophyllaeus mutabilis Rudolphi. Cen- 



tralbl. f. Bakt. u. Parasit., Bd. 29 (1901), pp. 485-91. 

 Schneider, G., "Carophyllaeus" fennicus n. sp. Arch. f. Naturges., Jahrg. 



68 (1902), Bd. I, p. 65. 

 Stossich, M., Una Nuova specie del genere Plagiorchis Liihe. Ann. Mus. 



Zool. Univ. Napoli, N.S., Vol. I, No. 16 (1904), p. 684. 

 Ward akd Whipple, Fresh-Water Biolog}', New York (19 18), pp. 404, 429. 

 Will, A., Anatomie von Carophyllaeus mutabilis Rudolphi. Zeitschr. f. 



wiss. Zool. Bd. 56 (1893), p. 4. 



