CONTENTS xiii 



Tribe 3 Hypostomata 585 



34 Suborder 3 Trichostomata 593 



35 Suborder 4 Hymenostomata 608 



36 Suborder 5 Thigmotricha 623 



37 Suborder 6 Apostomea 630 



38 Order 2 Spirotricha 636 



Suborder 1 Heterotricha 636 



39 Suborder 2 Oligotricha 652 



40 Suborder 3 Ctenostomata 665 



41 Suborder 4 Hypotricha 668 



42 Order 3 Chonotricha 681 



43 Order 4 Peritricha 683 



44 Class Suctoria 695 



45 Collection, cultivation, and observation of Protozoa 710 

 Author and subject index 731 



