10 PROCEEDINGS OF THE NATIONAL MUSEUM, vol.60. 



their terminations near the posterior extremity of the body, are hid- 

 den in ventral view by the vitelLaria. Behind the acetabulum is the 

 clinging plug which is 0.150 to 0.245 mm. long and 0.125 to 0.200 mm. 

 wide and which may be provided with a central depression and 

 padded margins. In some specimens the clinging plug is fungiform 

 in appearance and with a smooth surface. The transversely elon- 

 gated testes lie one behind the other and show slight indentations 

 around their margins. The anterior testis, 0.110 to 0.176 mm. long 

 by 0.154 to 0.240 mm. wide, lies on the median line or slightly toward 

 the left side, ventral to the posterior half of the clinging plug. The 

 posterior testis measures 0.116 to 0.176 mm. long and 0.165 to 0.275 

 mm. wide. The cirrus sac, 0.154 to 0.176 mm. wide (measured at its 

 middle portion) , extends obliquely from the right to the left side of 

 the median line, ventral to the testes. The cirrus opens dorsally into 

 the genital sinus. The small, globular ovary, 0.088 to 0.099 mm. in 

 diameter, lies ventral to the anterior testis toward the left side. The 

 shell gland is found posterior to the ovary and the viteHine reservoir 

 is between the two testes. Between the vitelline reservoir and the 

 left intestinal branch the ootype is situated. Laurer's canal is pres- 

 ent. The vitellaria, in the form of large acini, extend from a level 

 posterior to the acetabulum to the second testis. Anteriorly, between 

 the acetabulum and anterior margin of the clinging plug, the vitella- 

 ria from both sides of the body unite. The uterus is short and con- 

 tains only a few eggs (4 to 5 in number) which are 0.100 to 0.117 

 mm. long and 0.063 to 0.068 mm. wide and are brownish in color 

 The vagina is provided with a muscular sphincter at its opening on 

 the ventral portion of the genital sinus. The excretory system is in 

 the form of a network. 



Hosts. — Primary: experimental dogs and cats; secondary: fresh- 

 water fish {Tinea tinea, Aspius aspius, Carasslus earassius, Blieca 

 hjorkna, etc.). 



Location. — Adult in intestine of experimental dogs and cats. Im- 

 mature form in fresh-water fishes, presumably in the muscles. 



Locality collected. — Roumania. 



BIBLIOGRAPHY. 



CiuREA, Joan. 



1915. Un Echinostome dans I'iutestin du pore. Centralbl. f. Bakteriol., etc. 



Jena, Abt. 1, Orig., vol. 75, pp. 392-394. 



1916. Proliemistomum oppendicidatum, eine neue Holostomiden-Art aus Hun- 



de-und Katzendarm, dessen Infektionsquelle in der Siisswasserfischen 

 zu suchen ist. etc. Zeitschr. f. lufektionskrankh. parasit. Krankh. u. 

 Hyg. d. Haustiere, Berlin, vol. 17, pp. 309-328. 

 DiETZ, E. 



1909. Die Echinostomiden der Vogel. Diss. Konigsb. i. Pr., July, 37+ [3] pp. 



1910. Die Echinostomiden der Vogel. Zool. Jahrb., Jena, Suppl., vol. 12, pp. 



265-512. 



