19 13-] T. SouTHWELiv : Indian Cestoda. 283 



and the vagina open dorsally, uterus ventrally. The latter^ is 

 coiled and runs dorsally. A vesicula seminalis, situated outside 

 the cirrus-sac, is absent. The vagina crosses the uterus, and in 

 this way reaches the ventral surface. A separate receptaculum 

 seminahs is usually absent. Ovary ventral, and, in the case of 

 single genital organs, always median. Shell gland median and 

 dorsal. Yolk glands lateral, or even on the edges. Testes 

 lateral, a large part of them he external to the longitudinal 

 nerves', which latter are situated much further inwards. The 

 uterus 'never forms a "rosette." GenitaUa often double. Eggs 

 thin-shelled and without cover. In fish. 



(I) Genus Bothriocephalus, Rudolphi, 1808. 



General characters :—Scolex long. Suckers weakly developed. 

 Neck wanting. Segments incomplete. Yolk glands in skin layer. 

 Ovary median, ventral. No receptaculum seminalis. Mouth of 

 uterus ventral and median, both other openings dorsal and 

 median. 



Bothrioccphalus (Anchistroccphalus) polyptcra (Leyd), 



1853. 

 Two slide specimens only. 



ZEV^J-^-. Labeo rohita and Ophiocephaliis striatits. Berhampur, 

 Bengal. T. Southwell. 



Literature : — 



Liihe, 1899. Southwell, 1913. 



Family MESOCESTOIDIDAE, Fuhrmann, 1907. 



= Mesocestoidinae, Liihe, 1894. 

 = Mesocestoidae, Ariola, 1899. 



Family diagnosis :— Taenioidea. Scolex without rostellum or 

 hooks. Suckers unarmed. A single set of reproductive organs 

 in each segment. Genital pores located in the ventral surface of 

 the segment. Vagina opens in front of, or besides, the cirrus 

 pouch. Eggs in gravid segments enclosed in a single thick-walled 

 egg capsule. Adults in mammals and birds. 



Type-genus Mesocestoides, Vaillant, 1863. 



(I) Genus Mesocestoides, Vaillant, 1863. 



= Monodoridinm, Walter, 1866 (type Taenia utriciilifera, Walter 1866). 

 = Pfvchophysa, Hamann, 1885 (type Taenia cams-lagopodis, Rudolphi, 

 f8io). 



Generic diagnosis :—Mesocestoididae, with the characters of 

 the family. Adults in mammals and birds. 



Type-species Mesocestoides ambiguus, Vaillant, 1863. 



