558 BIOLOGY OF THE PROTOZOA 



( 'lass II. CNIDOSPORIDIA Doflein 



Order 3. Microsporidia Balbiani 



Sub-order 1. Monocnidea Leger and Hesse 



Family 1. Nosematidae Labbe 



Family 2. Coccosjjoridae Kudo 



Family 3. Mrazehiidae Leger and Hesse 

 Sub-order 2. Dicnidea Leger and Hesse 



Family Telomyxidae Leger and Hesse 



Class III. ACNIDOSPORIDIA Cepede 



< >rder 1. Sarcosporidia Balbiani 

 Order 2. Haplosporidia Liihe 



KEY TO SUBDIVISIONS AND GENERA OF SPOROZOA. 



1. Spores with thread capsules Class 2. Cnidosporidia 



Spores without thread capsules 2 



2. Reproduction ends life of parent organism 



Class 1. Telosporidia 

 Reproduction during continued vegetative 

 life Class 3. Acnidosporidia 



Class I. TELOSPORIDIA Schaudinn 



1. Typically celozoic parasites .. Sub-class I. Gregarinina 

 Typically cytozoic or hematozoic para- 

 sites Sub-class 2. Coccidiomorpha 



(Exception in Cryptosporidium) 

 Sub-class 1. Gregarinina (Gregarinae Doflein). 

 1. Sporozoites develop into sporonts; no 



asexual cycle Order 1 . Eugregarinida 



Sporozoites develop into agamonts; with 



asexual cycle Order 2. Schizogregarinida 



Order 1. Eugregarinida Doflein 



1. Typically with protomerite and deutomer- 



ite Sub-order 2. Septata 



Individuals of one chamber; no protomer- 

 ite Sub-order 1. Haplocyta 



Sub-order 1. Haplocyta Lankester 

 Key to Families 



1. Sporocysts alike at the two poles La 



Sporocysts with dissimilar poles 8 



la. Sporocysts without spines or processes. . . 2 

 Sporocysts with spines at each end 



Family 8. Syncystidae 



2. Trophozoites without attaching organs. . . 3 

 Attaching organs present 4 



3. Trophozoites solitary without free myo- 



neme threads Family 1. Monocystidae 



Trophozoites always in pairs: often with 

 free myoneme threads or longitudinal 



striations Family 2. Zygocystidae 



1. Trophozoites with epimerites ."> 



Trophozoites with suckers <> 



5. Individuals solitary 7 



Individuals associated in masses . Family 3. Diplocystipae 



