425] ANOPLOCEPHALIDAi—DOUTHITT 75 



Length, 1.6 to 2 m. Testes usually in two triangles, absent 

 from median part of the field. Orifices of suckers slitlike. 

 Host, Ovis aries. (See Stiles and Hassall, 1893.) 



M. trigonophora 



50. Length, 0.6 to 2.5 m. Testes in a quadrangle. Genital pores 



in anterior half of the segment. Hosts, Bos taurus and 

 Ovis aries. Description very incomplete. (See Stiles & 

 Hassall, 1893.) M. alba 



Length, 41 cm. Testes in entire median field, except part occu- 

 pied by female glands. No disk figured on pyriform body. 

 Host, Hippopotamus amphibius. Description poor, generic 

 position not established. (See von Linstow, 1901.) 



M. amphibia 



Length probably not over 10 cm. Poorly described. Host, 

 Ateles hypoxanthus, Brazil. See Liihe, 1895) M. rugosa 



Linstowinae 



51. Genital pores alternate. Cirrus pouch well developed. Female 



glands near the median line 52 



Genital pores unilateral. Cirrus pouch weakly developed. Fe- 

 male glands far from the median line, except Thysanotaenia 

 lemuris and Zschokkeella remota 53 



52. Genital canals ventral to excretory canals and nerve. Cortical 



layers of great thickness Linstowia, 54 



Genital canals between excretory canals. Cortical layer of 



ordinary thickness (See Fuhrmann, 1902.) 



"Taenia" anoplocephaloides 



53. For the following so-called genera, no differences of generic im- 



port are known, with the possible exceptions of Thysano- 

 taenia lemuris and Zschokkeella remota. It seems most 

 probable that they all belong in the genus Zschokkeella, 

 with the two exceptions mentioned. Most of the species are 

 poorly described, so no attempts at rearrangement have been 

 made. They are listed here merely to make the key com- 

 plete. 



Genus Zschokkeella 57 



Genus Inermicapisfer „ 58 



Genus Thysanotaenia 68 



Genus Hyracotaenia _ 69 



