Fig. 6. Fig. 7. 



Fig. 6, enlarged. Fig. 7, specimens from Rev. J. Rick, Brazil. 

 TYLOSTOMA RICKII. 



Fig. 8. 



Fig. 10. 



Fig. 8, enlarged. Figs. 9 and 10, specimens from Professor D. McAlpine, Australia. 

 TYLOSTOMA AUSTRALIANUM. 



