Vol. X, No. 5.] Ceetode Fauna of British India and Ceylon. 141 



[N.S.] 



multiplied, but the preceding examples suffice to show the wide 



range exhibited. 



Of the genera mentioned in the preceding paragraphs, the 

 following are represented in the collection of the Indian 

 Museum : — 



Mesocestoides, Vaillant, 1863. 

 Cittotaenia, Riehm, 1881. 

 Moniezia, Blanchard, 1891. 

 Thysanosoma, Diesing, 1835. 

 Cotitgnia. Diamare, 1893. 

 Dipylidium Leuckart, 1863. 

 Stilesia, Railliet, 1893. 



The topographical relation of the parts of the reproductive 

 organs to each other, and to the longitudinal vessel and nerves, 

 together with the nature and arrangement of the armature on 

 the head of the worm, are the details upon which, during very 

 recent years, an extensive and satisfactory system of classifica- 



tion has been elaborated, principally in Germany and America. 

 The table on the following page gives the host containing 

 the adult worm, and the host harbouring the larva, for a 

 number of species of Cestoda, and will serve to emphasize the 

 food relationships existing between the hosts in question for 

 each parasite named. 



