19 
5. 
+ 4- -t- + 
6 . 
7. 
8 . 
+ + 
9. 
10 . 
11 . 
12 . 
13. 
14. 
+ + + 
15. 
16. 
17. 
18. 
+ 
+ + 
f + + 
+ + + + 
1 . 
2 . 
3. 
F. J. Meggitt 
KEY TO SPECIES OF DAVAINEA- 
RosteJlar hooks 75-88/i, long 
Rostellar hooks 25-28/x long 
Rostellar hooks less than 20 p long . 
. . ( 6 ) 
D. undulata Fuhr. 
. . (7) 
Cirrus-sac reaching excretory vessels 
Cirrus-sac not reaching excretory vessels 
Testes forming a ring round the female organs 
Testes lateral and posterior to female organs. 
Genital cloaca with powerful sphincter muscle 
Sphincter muscle of genital cloaca weak or absent 
D. linstoici Meggitt 
D. beddardi Meggitt 
D. cryptacantha Fuhr. 
. . ( 8 ) 
D. macrocirrosa Fuhr. 
. . (9) 
Testes less than 15 
Testes more than 20 
Rostellar hooks 120, 9-10/x long 
Rostellar hooks 300, 14-16/x long 
Rostellar hooks ?, 6-7 p long 
Rostellar hooks 9p long or less 
Rostellar hooks 12 p or more 
Egg-capsules extending laterally beyond excretory 
vessel. 
Egg-capsules not extending laterally beyond excret 
Cirrus-sac reaching excretory vessel 
Cirrus-sac not reaching excretory vessel 
Rostellar hooks 500, 14/x long . 
Rostellar hooks 350 or less 
. . ( 10 ) 
. . ( 11 ) 
D. paucitesticulata Fuhr. 
D. calcarea Fuhr. 
D. crypturi Fuhr. 
. . ( 12 ) 
. . (14) 
D. crypturi Fuhr. 
ory vessel (13) 
D. goura Fuhr. 
D. lateralis Bourq. 
D. provincialis v. Linstow 
. . (15) 
Egg-capsules contain 4-5 eggs. D. lateralis Bour. 
Egg-capsules contain 8 eggs or more.(16) 
Testes 20.(17) 
Testes 50 or more.(18) 
Rostellar hooks 180-200 
Rostellar hooks 350 . 
D. aruensis Fuhr. 
D. macroscolecina Fuhr. 
Genital pore anterior. 
Genital pore half-way. 
Genital pore posterior. 
D. micracaniha Fuhr. here. 
D. lutzi Parona here. 
D. lutzi Parona here. 
D. lateralis Bourq., D. macroscolecina Fuhr. here. 
D. globirostris Fuhr. 
D. leptacantha Fuhr. 
D. uniuterina Fuhr. 
Bb. 
Rostellar hooks absent.(2) 
Rostellar hooks present.(3) 
Length 17 mm., genital pore ventral to proglottis 
margin. D. volula (v. Linstow) 
Length 21 mm., genital pore marginal D. parva v. Jan. 
Rostellum longer than broad, 40 hooks, 27p long . D. campanulata Fuhr. 
Rostellum broader than long.(4) 
2—2 
