Na2258 TAEXIOID CB8T0DES OF DOGS AND CATS— HALL. 



19 



Location. — Intestine of primary host. 



Localities. — Nevada (Fallon) ; Southern New Mexico. 



Life history. — Unknown. 



The uterine structure is of the type found in such tapeworms as 

 T. taeniaeformis and indicates that the lynx is probably the normal 

 host, as the dog is certainly an 

 accidental or occasional host. On 

 the other hand, the narrow neck 

 in T. halaniceps is quite different 

 from the thick neck or the absence 

 of a neck in many tapeworms 

 l^arasitic in the Felidae. 



:i 



TAENIA BRAUNI Setti. 1897&. 



Fig. 18.— Taenia 

 BRAUNI. Large 

 HOOKS. X 100. 

 After Setti, 

 1897. 





Flo. 17.— Taenia brauni 

 Anterior extremity 

 X 20. After Setti, 1897 



Fig. 19.— Taenia 

 BRAUNI. Small 

 HOOKS. X 100. 

 After Setti, 

 1S97. 



Specific diagnosis. — Taenia: 

 The head (fig. 17) is slightly 

 flattened in the dorso - ventral 

 plane and attains a maximmn 

 diameter of a little over 1 mm. 

 The rostellum is not strongly de- 

 veloped and bears a double crown 

 of 30 hooks. The large hooks (fig. 18) are usually 130 to 140 [x 

 long, occasionally only 95 to 100 y. long. The blade is of slight 

 curvature; the handle is straight, of slightly wavy outline, and dis- 

 tinctly marked off dorsally at its union with the blade ; the guard is 

 conical in lateral view and tends to be bifid to a slight extent. The 

 small hooks (fig. 19) are usually 85 to 90 [x long, occasionally only TO 

 to 75 [1. long. The blade is of moderate curvature; the 

 handle ig short and curved, the convexity ^ 



of the curve being on the ventral side; and 

 the guard is shaped like that of the large 

 hook. The suckers are round and are com- 

 paratively small, with a maximum diam- 

 eter of 300 [x. The neck is of about the same 

 diameter as the head and is short, seg- 

 mentation being clearly marked 2 mm. 

 from the anterior extremity of the body. 

 The strobila attains a maximum length of 

 15 to 18 cm. and a maximum width of 6 

 mm. The anterior segments are 100 \i. long 

 and 1.3 mm. wide. In the middle of the 

 strobila (fig. 20) the segments are still 

 transversely elongated, being 1.5 mm. long and G mm, 

 terminal gravid segments (fig. 21) are 5 to G mm. long and 3.5 mm. 

 wide. The segments are rectangular and do not present a serrate 



Fig. 20.— Taenia 



BRAUNI. Me- 

 DLi.N PORTION 



of strobila. 

 Actual size. 

 After Setti, 

 1897. 



Fig. 21.— Taenia 

 BRAUNI. Pos- 

 terior portion 

 OP strobila. 

 Actual size. 

 After Setti, 

 1897. 



wide. The 



