NO. 2258 TAENIOID CEST0DE8 OP DOGS AND CATS— HALL. 



21 



TAENIA BRACHYSOMA Setti, 1899c. 



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Fig. 24— Taenia 

 brachysom a. 

 Large hook. 

 X 200. After 

 Setti, 1899. 



Fig. 23.— Taenia 

 brachysoma. 

 Anterior ex- 

 tremity. X20. 

 After Setti, 

 1899. 



Specific diagnosis. — Taenia: Head (fig, 23) about 700 \i. in diamete..- 

 and more or less elongate piriform in shape. Rostellmn prominent 

 and bearing a double crown of 30 to 32 

 hooks. The large hooks (fig. 24) are 135 

 to 145 [I. long. The blade has a rather 

 slight curvature; the handle is slightl}^ 

 curved, at times irregularly so, with the 

 convexity of the curve on the dorsal sur- 

 face and meeting the similar curve of the 

 blade in a distinct obtuse angle opposite 

 the middle of the guard; the guard is 

 thick, and in lateral view the sides of 

 the guard are approximately parallel, the 

 distal extremity being bluntly rounded. 

 The small hooks (fig. 25) are 95 to 105 ;j. 

 long. The blade makes a very sharp curve 

 toward the axis of the handle and sruard 

 and then straightens out, its distal portion 

 being roughly parallel to the axis of the 

 handle and guard; the handle is very short and blunt, 

 with a slight tendency to curve dorsally at the tip ; the 

 guard is rather broad, furrowed to show a trace of bifid- 

 ity, and tends to be twisted so that the lateral axis lies 

 in the plane of the blade and handle. The suckers are 

 round and have a maximum diameter of 250 to 270 \}. 

 with a circular or elliptical aperture of 

 about 150 [X. The neck is distinct, nar- 

 rower than the head, with an average 

 measurement of 300 to 400 \i and not ex- 

 ceeding 1 mm. long to the first distinct 

 segmentation. The strobila (fig. 26) at- 

 tains a maximum length of 10 cm. and a 

 maximum w^idth of 3 mm. The first seg- 

 ments are 40 to 70 [x long and 350 to 450 a 

 wide ; 5 mm. back of the head they are 200 

 to 230 [i. long and 600 to 900 ix wide ; 1 cm. back of the 

 head they are 240 to 260 [x long and 800 [x to 1 mm. 

 wide; in the middle of the strobila they are 750 jx to 

 1.25 mm. long and 2.3 to 2.8 mm. wide; 2 cm. from the 

 posterior extremity they are 1.25 to 1.7 mm. long and 

 2.5 to 3 mm. wide; the terminal segments are 2.5 to 3 

 mm. long and 2.o to 2.5 mm. wide. There are 140 to 

 180 segments. The first segments are trapezoidal with projecting 

 posterior angles forming a serrate strobila margin. The segments 



Fig. 25.— Taenia 

 brachysoma. 

 Small hooks. 

 X 200. After 

 Setti, 1899. 



Fig. 26.— Taenia 

 brachysoma. 

 Entire stro- 

 bila. Actual 

 SIZE. After 

 Setti, 1899. 



