584 

 Family TAENllDAE. 



Diagnosis; Head with 4 cup-shaped suckers, losiellum pre- 

 sent but not always evident; uterine pore wanting; genital 

 pores generally marginal; body always segmented. Type 

 genus: Taenia Linne, 1758. 



This family is an extremely important one from an 

 agricultural standpoint as all the tapeworms of do 

 mesticated animals (with the exception of a few be- 

 lougiug to the Bothriocephalidaej are classitied here. 

 Probably all of the tapeworms normally found in puul 

 1 1 y belong to the subfamily Dipylidiinae. 



The subfamily Taeniiaei (type genus: Taenia Linne, 175&) 

 contains mostly large tapeworms, the adult stage of which 

 lives in carnivorous animals (T. saginata of man, T. marginata 

 of dogs, for instance) while the larval stage lives in herbivor- 

 ous animals (Cysticercus bovis of cattle, C. tenuicoUis of sheep, 

 cattle, etcj. 



The subfamily Anoplaocepholinae (type genus: Anoplocephala 

 E. Bl., 1848) contains most of the adult tapeworms of horses, 

 cattle, sheep, labbits, and allied animals. 



Subfamily MESOCESTOIDINAE. 



Diagnosis: Head with four suckers; segments distinct; genital 

 pores in median ventral line. Type and only genus: Mesoces- 

 toides Vaillant. 1863. 



Genus MKSOCKSTOIDES Vaillant, 1863. 



(1885, Ptychophysa Hamann.) 



Diagnosis; Char, of subfamily; a single egg sac present. 

 Type species: M. ambiguus Vaillant, 1863. 



Railliett (1893, p. 313) places Polonio's Taenia im 

 butiformis of wild geese in this genus as a species in- 

 quirenda. but I can not recognize Polonio's description 

 and figure as supporting this view (vide p. 58). This 

 genus would, therefore, according to my view, be 

 witJiout any represeutalivt' among the parasites of do- 



iSyn. 1658, Sclerolepiduta Weinland (hard-shell tapewoiiiis>; 

 Cysticaae; Cystotaenlae. 



