198 PROCEEDINGS OF THE NATIONAL MUSEUM vol.84 



9. Bodj' more than 1 mm long 10 



Body less than 1 mm long 12 



10. Testes more than 0.20 mm in greatest diameter; body more 



than 2 mm long; ratio of sucker sizes, 3:2 louisianae 



Testes less than 0.20 mm in greatest diameter 11 



11. Testes more than 0.10 mm in greatest diameter ; body 1.2 mm 



long; ovary 0.1 mm in greatest diameter; vitelline follicles 



spindle-shaped, sparse; ratio of sucker sizes, 3:2 dorsale 



Testes less than 0.10 mm in greatest diameter; body 1.2 mm 

 long; ovary less than 0.1 mm in diameter; vitelline follicles 

 numerous; ratio of sucker sizes, 3:2 storeriae 



12. Body 0.85 mm to 0.95 mm long ; ovary 0.076 mm by 0.084 mm ; 



testes more than 0.1 mm in diameter ; ratio of sucker sizes, 



3: 2 (?) m.eridionalis 



Body 0.50 mm to 0.95 mm long; ovary 0.1 mm or more in 

 diameter ; testes less than 0.1 mm in diameter ; ratio of 

 sucker sizes, 2: 1 daviesi 



