F. J. Meggitt 
KEY TO SPECIES OF DAVAINEA— continued. 
17 
12 . 
13. 
14. 
+ + 
15. 
+ + + + + 
16. 
+ + + + 
17. 
18. 
19. 
+ + + 
20 . 
21 . 
22 . 
23. 
24. 
25. 
26. 
27. 
Rostellar hooks 90. D. madagascariensis Dav. 
Cirrus-sac not passing nerve-cord; rostellar hooks 
80. D. corvina Fuhr. 
Cirrus-sac reaching lateral excretory vessel; ros¬ 
tellar hooks 120. D. gracilis Jan. 
Accessory hooks posterior to rostellum . . . D. frontina Duj. 
Accessory hooks absent.(14) 
Testes extending laterally beyond nerve. . . D. penelopina Fuhr. 
Testes not extending laterally beyond nerve . . . . (15) 
Cirrus-sac not reaching excretory vessels 
Cirrus-sac reaching or passing excretory vessels . 
Cirrus-sac nearly reaching to aporal excretory vessels I). 
. (16) 
• (24) 
sphaeroides Clerc. 
Egg-capsules extending laterally beyond excretory vessels. 
Egg-capsules not extending laterally beyond excretory 
vessels. 
(17) 
( 20 ) 
Egg-capsules containing 2-3 eggs . 
Egg-capsules containing more than 5 eggs 
Receptaculum seminis present . 
Receptaculum seminis absent . 
Rostellar hooks 140, 5p long 
Rostellar hooks 120, 10 p long .. 
Rostellar hooks 100, 0-9 p long 
• • (18) 
• • (19) 
D. friedbergi v. Lins. 
D. multicapsulata, Fuhr. 
D. cyrtus Skr. 
D. ceylonica Baez. 
D. telragona (Molin) 
Three layers of longitudinal muscles 
Two layers of longitudinal muscles .... 
Testes 5-6. 
Testes more than 12. 
Rostellar hooks 80. 
Rostellar hooks more than 150. 
Egg-capsules contain 3-6 eggs. 
Egg-capsules contain 6-12 eggs .... 
Egg-capsules contain 10-14 eggs .... 
20 eggs per egg-capsule. 
12 eggs or less per egg-capsule . . . 
Rostellar hooks 200, testes 20-30 .... 
Rostellar hooks 120, testes 35-40 . 
Rostellar hooks 70, testes 60. 
Testes 15 or less.. 
Testes 20 or more. 
Rostellar hooks Sp long. 
Rostellar hooks 10p long, egg-capsules extending 
laterally to excretory vessels .... 
Rostellar hooks 10-13 p long, egg-capsules not ex¬ 
tending laterally to excretory vessels . 
D. spiralis Baez. 
. . ( 21 ) 
D. oligorchidna Fuhr. 
. ( 22 ) 
D. comitala Rans. 
. (23) 
D. galeritae Skrj. 
D. microscolecina Fuhr. 
D. psittacea Fuhr. 
D. werneri Klap. 
. . (25) 
. (26) 
D. pintneri Klap. 
D. gracilis Jan. 
D. leptosoma (Dies.). 
D. trapezoides Jan. 
. . (27) 
D. crassula (Rud.) Clerc. 
D. volzi Fuhr. 
D. microscolecina Fuhr 
Parasitology xm 
