G24 



c Genital pores unilateral. 



24. I'AVAINKA FRIEDBERGKRI (von Linslow, 1878) R. UlHiicha.d, IKSl. 



(1878, Taenia Friedbergeri von Linstow [May 16]; ? 1878, Taenia 

 agama Megmin [Augrust]; ? 1878, T. infundibulifonmis vai. 

 phasianorum Meg-nin [September"]; 1888, T. cesticillus var. 

 phasianorum Neumann.) 



[PI. XVIII, figs. 236-242.1 



Diagnosis: trobila up to 200nin> and more long by 2mm to Smm 

 wide. Head pyriform, 0.386mm broad by O.SOmm long; rostellum 

 armed with a double row of hooks, 75 in each row, 12 « long; 

 suckers elliptical, armed with 4-5 rows of hooks, of which those 

 on the middle row are smallest. Neck thin, 2mm to 3mm long. 

 Anterior segments very short, the following gradually increase 

 in length, the distal borders projecting so as to give a serrate 

 appearance to the worm; in the posterior sixth the segments 

 become moniliform, the last segments almost globular, fre- 

 quently orange in color. Genital pores unilateral, in middle of 

 the margin. Ova 34 /* to 38 /i, onccspheric hooks 6.5 ft. 



Development: Unknown; Friedberger and Megnin think that 

 ants ("Formica rufa?") form the intermediate host, but ex- 

 periments (Friedberger) were negative. 



Hosts: Pheasants (Phasianus colchicus). 



Geographical distribution: Geirmany and France. 



Epidemics: Friedberger (1877, pp. 99-112) gives quite 

 an extensive account of an outbreak of disease among 

 pheasants which he attributed to the presence of the 

 large number of tapeworms. A remarkable difference 

 in the development of the young pheasants was 

 noticed. Many of them became sick. The appetite 

 remained good for the most part, but the animals grew 

 dull and their feathers became ruffled. Suddenly the 

 animals would wake up, run around, and take food; 

 then they would quiet down again, close their eyes, and 

 finally die. 



Several post-mortems were made, and in all cases 

 numerous tapeworms were found in the intestine. A 



