NO. 2268. TAENJOID CEST0DE8 OF D008 AND CATS— HALL. 73 



DIPYLIDIUM CANINUM (Lmnaeos. 1758rt) Rallliet, 1892 c. 



Synonyms. — Taenia canina Linnaeus, 1758a; T. 7fioniliformis Pal- 

 las, 1781, not Batscli, 1786a.; T, cucumerina Bloch, 1782a; T. cateni- 

 formis Goeze, 1782a; T. elUptica Goeze, 1782a; T. ellyptica Batsch, 

 1786a; T. cateniformis canina Linnaeus of Gmelin, 1790a; T. c. 

 fells Gmelin, 1790a; Alyselminthus ellypticus (Batsch, 1786a) Zeder, 

 1800a; Taenia cunciceps Zeder, 1800a; Ilalysis ellyptica (Batsch, 

 1786a) Zeder, 1803a; Tenia canina (Linnaeus, 1758a) van Beneden, 





I,- 



M 



# 



i/iomm 



FlU. 77.— DlPYLIPIUM CANimJM. HEAD. 



1861a; T. cucumerina (Bloch, 1782a) van Beneden, 1861a/ Taenia 

 {Dipylidium) cucumerina Bloch of Leuckart, 1863; Gryptocystis 

 trichodectis Villot, 1882; DypyUdium caninv/m (Linnaeus, 1758a) 

 von Katz, 1897. 



Specific diagnosis. — Dipylidium: Head (fig. 77) small and rhom- 

 boidal, 350 to 460 ]}. in diameter in a state of contraction. K-ostellum 

 claviform, 185 [jl long in a state of complete evagination, 110 to 120 n 

 wide, and capable of retraction into a deep cephalic infundibulum. 

 It is armed with three or, usually, four circlets of about 60 hooks 



