NO. 2258 TAEMOID CESTODES OF DOGS AND CATS— HALL. 



31 



backed jackal. 





y- 



Hi 



V' ? 



as a rule. The eggs are elliptical, 38 to 39 \). long and 34 to 35 i». 



wide. The shell is 4 [jl thick. 



Hosts. — Primary : Canis familim^is, C. lupus, C. mesomelas, saddle- 

 Felis catus {F. domestica) . Secondary: Bos 

 taurus, Ovis aries^ Sus scrofa, S. scrofa 

 domestica, Capra hircus, Dniker, 

 Springbok, Rooi reebok, ^^ Simia 

 faunus,''^ Preshytis entellus {Semno- 

 pithecus entellus), Lasiopyga cyno- 

 sura {Se^nnopithecus cynosurus), 

 Lasiopyga mona {Cercopithecus 

 mona), Lasiopyga sahaeus (C. sah- 

 aeus) , Pithecus species {Macacus cyno- 

 m.olgus), Siviia sylvanus (31. inuus), 

 Papio maimon, Sciurus niger neg- 

 lectus {8. cinereus), S. vulgaHs, Ovis 

 argali, 0. musimon, Rupicapra rupi- 

 capra {R. tragus), Oryx heisa, 0. leu- 

 coryx. Saiga tartarica, Gazella dorcas, 

 Anfidorcas euchore [G. euchore), 

 Kohus ellipsvpryinus, Mazama imfa 

 {Gariacus rufus), Mazama nemori- 

 vaga (0. siTuplicicornus) , Capreolus 

 capreolus {G. caprea) ,Rangifer taran- 

 dus {Tarandus rangifer), Axis axis 

 {Gervus axis), G. elaphus, Rusa uni- 

 color (G. unicolor), PJiachochoerus 

 afrlcanus, P. aethiopicus, Potamo- 

 choerus koiropotamus (P. porcu^), 

 Bharrel, Odocoileus hemionus {Gari- 

 acus 7nacrotis), Rangifer terrae-novae 

 {R. novae-terrae) , Aloes alces [A. 

 macJilis), Ovis 7nexicana, Odocoileus 

 ainencanus {Gervus virginianus) , Co- 

 lumbia deer. 



Location. — In small intestine of pri- 

 mary host. Imbedded in liver, or free 

 and especially to mesenteries, in abdominal 



) 



riG. 36.— Taenia HYDATiGENA. Gravid 

 SEGMENT. After Ransom, 1913. 



or attached to viscera, 

 cavity of secondary host. 



Locality. — Cosmopolitan. 



Life history. — The eggs produced by the adult worm in the intes- 

 tine of the primary host pass out and are ingested in contaminated 

 food or water by the secondary host. In the digestive tract of the 

 secondary host the embryo is liberated from its shell and bores its 



