A NEW SPECIES OF AVIAN TAPE-WORM. 



149 



out bristles, and the remainder of the sexual organs were only 

 imperfectly developed. He also, in an Anas marila that was 

 shot on the east coast of Jutland, found besides Taenia te^iuirostris 

 numerous tape-worms which he felt he must refer to as being 

 T. microsoma. They were about 30 mm. long. In some instances 

 the strobila contained 500 segments in a very loose condition, 

 and the last segments contained mature eggs. The hooks on 

 the rostellum (Krabbe gives no number) were 0*036 mm. Krabbe's 

 Bidrag til hundskab om Fuglenes Baendelorme, p. 48, No. 53, 

 figs. 146-56. 



Description of Strobila. 



The maximum length of my specimen was 3'712 mm., and the 

 breadth of the terminal segments 0*245 mm. The greatest 

 number of segments in a strobila was twenty-five. The scolex 

 IS sub-globular, but liable to variation, and bears four large 

 suckers (Fig. 3). The rostellum when everted is long, 0*203 mm., 

 similar to that of longirostris, and at its proximal end is a bulb 

 0"044mm. in diameter, w^iich bears a crown of ten sickle-shaped 

 {DrejKinidotaenia, Railliet) hooks 0"034-0"035 mm. in length. 

 Length of scolex approximately 0*1 35 mm., diameter 0*203 mm. 

 Neck short, 0*07 mm. in length. Segments sharply defined at 

 base of neck. The following table gives the length and breadth 

 of the various segments in the strobila : 



STROBILA. 



SEGMENTS. 



Nos 



1 



2 



3 



5 



6 



9 

 10 

 12 

 13 

 16 

 17 1 

 19/ 

 20 \ 

 22 J 

 23 

 24 

 25 



} 

 } 

 } 

 } 



Length. 

 0-043 mm. 

 005 ,, 



0-067 



0-084 



0-111 



O'llS 



0135 



0-169 



0-203 

 0-34 

 0-371 ., 



Nos. Breadth. 

 Neck 0101mm. 



J} 



16 



19 i 



20 



21 



23 



24 



25 



} 



0-101 



0-135 



0-17 



0-203 



0-245 



) 



