140 Journal of the Asiatic Society of Bengal. [May, 1914, 



1912) a peculiar asexual tapeworm (Urocystidium gemmiporum) , 

 from the rodent, Fiber zibethicus. 



Segmentation of the strobila is absent or indistinct in cer- 

 tain of the lower forms of Cestoda, and also in the following 

 genera : 



Triplotaenia , Boas, 1902. 



Parviroslrum, Fiihrmann, 1907. 



N ematotaenia , Liihe, 1899. 



The family Fimbriariidae, Frolick, 1802. 



T etracisdicotyla , Fiihrmann, 1907. 



Typically, each segment possesses a single genital apertuiv 

 situated laterally. These pores may be unilateral, or regularly, 

 or irregularly, alternate. 



Genital pores appear to be absent in the genus Aporina, 

 Fiihrmann, 1902. 



In the genus Mesocestoides, Vaillant, 1863, the genital pores 

 are located in the ventral surface of the segment. 



Within the order Pseudopkyllidae, Carus, 1863, external 

 segmentation may be present or absent, and three genital pores 

 are present. The uterine pore is always on one of the surfaces, 

 whilst the vaginal and cirrus pores may be on the same surface 

 as the uterine, or on the opposite surface or marginal. 



In the genus Copesoma, Fiihrmann, 1907, the genital pores 

 are ventral in young strobila, and marginal in gravid segments. 



Genital pores are duplicated in the following genera : 



Cittotaenia, Riehm, 1881. 

 Moniezia, Blanchard, 1891. 

 Thysanosoma, Diesing, 1835. 

 Cotugnia, Diamare, 1893. 

 Dipylidium, Leuckart, 1863. 

 Pancerina, Fiihrmann, 1899. 

 Stilesia, Railliet, 1893. 

 Diploposthe, Jacobi, 1896. 

 Amabalia, Diamare, 1893. 

 Triplotaenia, Boas, 1902. 



The latter genus possesses 4 or 5 cirrus pouches in each 

 lateral half of the segment. 



In the genus Diplothallus , Fiihrmann, 1900, and Amabalia, 

 Diamare, 1893, each segment contains a double set of male, 

 and a single set of female, genital organs. 



In the genus Dioicocestus, Fiihrmann, 1900, where the 

 strobila is entirely male or female, the female reproductive 

 organs are single in each segment, whilst the male genital organs 

 are double. 



In the family Fimbriariidae, Wolff hugel, 1898, neither the 

 strobila nor the reproductive organs are segmentally arranged. 



Instances of other variations to be met with could be 



