16 
Tapeworms from Ostrich 
Insecta. 
Musca domestica L. D. cesticillus Ackert, 1918, 41. Guberlet, 
D. tetragona (Molin, 1858), cysticercoid. 1916 a, 233. 
Ackert, 1919, 28. Guberlet, 1916 a, 233. 
Mollusca. 
Limax agrestis L. Limax variegatus Drap. 
D. proglottina (Davaine, 1870), cysticercoid. D. proglottina (Davaine, 1870), cysticercoid. 
Limax cinereus Lister. 
D. proglottina (Davaine, 1870), cysticercoid. 
Hosts unknown. 
D. appendiculata Fuhrmann, 1909. D. echinata Fuhrmann, 1909. 
1 . 
2 . 
3. 
4. 
5. 
+ 
6 . 
7. 
8 . 
9. 
10 . 
11. 
Key to Species of Davainea. 
Genital pores unilateral, suckers armed . 
Genital pores unilateral, suckers unarmed 
Genital pores alternate, suckers armed . 
Genital pores alternate, suckers unarmed 
Aa 
Ab 
Ba 
Bb 
Aa. 
Eggs singly in the parenchyma 
Eggs in groups in capsules 
Proglottides with lateral appendages 
Proglottides without lateral appendages. 
Rostellum with accessory spines 
Rostellum without accessory spines. 
Rostellar hooks in two rows 
Rostellar hooks in form of a rosette with eight limbs 
Testes 2 
Testes more than two. 
. . ( 2 ) 
. . (13) 
D. appendiculata Fuhr. 
. . (3) 
. . (4) 
. . (5) 
D. sphecotheridis John. 
D. rhynchota Rans. 
D. contorta Zsch. 
( 6 ) 
Cirrus-sac nearly reaching aporal margin . . . . (7) 
Cirrus-sac not passing centre of proglottis . . . . (8) 
Rostellar hooks 400, 15/x long. D. compacta Clerc. 
Rostellar hooks 300, 6-7 p, long . ... D. sphaeroides Clerc. 
Rostellar hooks 200, 14-16/x long . ... D. cruciata Rud. 
Rostellar hooks 160-180, 9-10/x long D. numida Fuhr. 
Rostellar hooks 400 D. compacta Clerc. 
Rostellar hooks 200 .(9) 
Rostellar hooks 120 or less.(10) 
Rostellar hooks 14-16/x long. D. cruciata Rud. 
Rostellar hooks 22-23 y long. D. paradisea Fuhr. 
Testes 100.(11) 
Testes 50 or less.(12) 
Rostellar hooks I2p long. D. retractilis Stiles 
Rostellar hooks 22-23/x long. D. paradisea Fuhr. 
