66 ILLINOIS BIOLOGICAL MONOGRAPHS [416 



11. Testes transversely elongated. Genital pore near middle of 



lateral margin. Uterus not extending ventral to ovary. 

 Host, Evotomys gapperi galei, of Colorado. (See present 



paper.) _ — A. communis 



Testes not transversely elongated. Genital pores near distal 

 end of lateral margin. Uterus extends ventral to ovary. 

 Host, Sciurus hudsonica, Minnesota. (See present paper.) 



A. primordialis 



Genus Bertiella (Synonym: Bertia) 



12. Genital pores alternate 13 



Genital pores unilateral. Host, Bucorax abyssinicus. Not 



properly described, position not assured. (See Fuhrmann, 

 1904.) _ B. pinguis 



13. Dorsal excretory duct actually dorsal. Three longitudinal nerve 



trunks on either side. Cirrus pouch very small (except in 



B. poly orchis) . Female glands in a dorsoventral row 14 



Dorsal excretory duct dorsomesial to ventral. Cirrus pouch of 

 ordinary size, and well developed (except in B. rigida). 

 One longitudinal nerve trunk on either side (no statement 

 for B. rigida). Female glands arranged in a transverse row. 



Dorsal excretory duct not known, apparently absent. One nerve 

 trunk. Cirrus pouch of ordinary size, egg-shaped. Female 

 glands in a dorsoventral row. A long, convoluted vas def- 

 erens. Host, Lagidium peruanum. Not properly described. 

 Assigned by von Linstow (1904) to the genus Bertia, but 

 it is by no means certain that it belongs amongst the Ano- 

 plocephalidae B. forcipata 



The following poorly known species is placed in the genus Ber- 

 tiella, perhaps correctly so. Strobila 245 mm. or more long 

 by 10 mm. broad. Number of segments about 350. Genital 

 pores very small, irregularly alternate. Dorsal canal lateral 

 to ventral. Cirrus pouch large and elongate. Host, Simia 

 satyrus. (See Stiles, 1896; or R. Blanchard, 1891.) 



B. satyri 



14. Genital pores regularly alternate. Receptaculum seminis poorly 



developed. Ovary extends through one-sixth of the field 

 between the excretory ducts and is not bilobed. Host, 



Troglodytes niger, Africa. (See Bourquin, 1905.) B. studeri 



Genital pores alternate, frequently with regularity. Ovary ex- 

 tending through about one-fourth the width of the proglot- 



