NO. 2258 TAENWID CE8T0DES OF DOGS AND CATS— HALL. 



15 



s©s 



they lie in the lateral portion of the median field and cross the median 

 field anteriorly; they appear to cross the field of the 

 vas deferens and vagina at times, and extend close to 

 the ovaries laterally as a rule, occasionally occurring 

 posterior of the lateral portion of the ovaries ; they do 

 not lie so near the dorsal transverse musculature as in 

 I'aenia taeniaeformis. The vas deferens is very much 

 looped, but pursues a fairly straight course from a 

 point near the median stem of the uterus, on the pore 

 side of the segment to the cirrus pouch. The cirrus 

 pouch is very long and narrow and extends from the 

 median border of the ventral excretory canal across 

 both canals; it is 300 to 345 [x long and 35 to 60 [/, wide. 

 Female genitalia. — The ovaries are elongated along 

 the transverse axis of the strobila and inclose, usually, 

 an oval to round interovarian field; the individual 

 branches of the ovary are only moder- 

 ately compact; the ovaries are of the 

 same size, or the one on the aporal side 

 may be slightly larger. The vitellarium 

 is elongated along the transverse axis of 

 the worm in contact with the posterior 

 curvature of the ovaries and extends 

 about as far laterally as do the ovaries. 

 The shell-gland is obscured or incon- 

 spicuous. The vagina comes in from the 

 genital pore in a long straight line and 

 makes a very slight curve around and 

 close to the nearest ovary. The uterine 

 stem begins its initial development in the 

 posterior portion of the segment, widening to fill the 

 interovarian field and sending branches posterior of 

 the ovaries. In the gravid seginents (fig. 11) there are 

 on each side 8 to 15 lateral branches, relatively short 

 and themselves branching. In the last segments the 

 main branches are amalgamated at the base. The egg 

 is oval, 34 to 38 [j. by 25 to 27 [jl in diameter, with a shell 

 4.5 [x thick. 



Hosts. — Primary: Felis tigrina., F. yagouaroundi 

 {F. jaguarundi) , F. sp., Oalictis sp.. Lynx ruffu^ (L. 

 rufa)., L. haileyi. Secondary: Sylvilagus hrasiliensis 

 {Lepus hrasiliensis). 



Location. — Intestine of primary host: Free in 

 body cavity or encapsuled in the liver, in the 

 region of the kidney or between the back muscles 



in the secondarv host. 



Fig. 11.— Taenia 

 macrocystis. 

 Geavid seg- 

 ment. X 5.5. 

 After LChe, 

 1910. 



imfn 



Fio. 10.— Taenia 

 macrocystis. 

 Entire stro- 

 bila. 



