CONTENTvS. 
Page 
Introduction . . . . , . , . . . . . 323 
Comparative anatomy of Thalassema sabinitm, T. dendrnrhynchus and T. hranchio- 
rhvnchus. 
External characters . . , , . . . . . . 324 
Proboscis — its structure and function . . . . . . . . 325 
Integument . . . . . . . . . . . . 331 
Alimentary canal . . . . . . . . . . . . 331 
Nervous system . . . . . . . . . . 332 
Blood-vascular system . . . . . . . . . . 332 
Segmental organs . . . . . . . . . . 333 
Anal vesicles . . ... . . . . . . . . 334 
Summary . . . . . . . . . . . . 336 
Description of Thalassema kempi, sp. nov. . . . . . . . . 336 
Literature . . . . . . . . . . . . . . 337 
