728 besing. 



individuorum in globulum unum coalescit ex quo demum sporulae (navicellae) 

 numerosae evolvuntur, Gregarinae originem pracbentes (Stein) *). 



Contcntum Gregarinae, in cystidem immobilem mutatae, per partitionem 

 in psorospermias transformatur ; in psorospermiis formantur nuclei, qui postea 

 liberati per formas transitorias (Amibas) in Gregarinas evolvuntur (Lieber- 

 kühn) 3). 



GREGARINA DUFOUR. Charactere aucto. 



Schwiele Ramdohr. — Bullulina, Clepsidrina, Pyxinia et Rhizinia Hammer- 

 schmidt. — Echinorbynchus Zenker. — Stylorhynchus, Actinocephalus, 

 Sporadina, Monocystis, Zygocystis et Didymophyes Stein. 



Character tribus simul generis. 

 *Statu completo: 

 Animalcula solitaria. Corpus proboscide et proboscidis recep- 

 taculo instructum. — Sub conjugatione animalcula duo sunt juxta- 

 posita. (Stylorhynchus et Actinocephalus Stein). 



\ Gymnorhynchae : Proboscis nee fimbriata, nee echinata. 



1. (8.) Gregarina Heerii KOELLIKER. — Syst. Helm. II. 9. exclus. 

 addend. p. 552. adde: 



In hae specie cystides e conjugatione ortae observatae. 



2. (9.) Gregarina brevirostrata KOELLIKER. — Syst. Helm. II. 9. 



3. (10.) Gregarina ovalis STEIN. —Syst. Helm. II. 9. et 552. adde: 



Gregarina polymorpha Frantzius Observ. 26 partim Fig. V. 3 (sine 

 proboscide) et in Wiegmann's Arch. 1848. Tab. VII. V. 3. (sine 

 proboscide). 



Stylorhynchus ovalis Stein: in Müller's Arch. 1848. Tab. IX. 19—20. 

 (cystides). 

 Individua duo in conjugatione observata (Stein). 



4. (11.) Gregarina Phallusiae ECKER. — Syst. Helm. II. 9. 



5. (12.) Gregarina Balani ECKER. — Syst. Helm. II. 10. 



6. (12*.) Gregarina ©vieeps DIESING. 



Proboscis ovalis, inermis. Receptaculum subsphaericum vel 

 ovale. Corpus conicum reeeptaculo triplo longius. Longit. tot. 



7« "'— %'";crassit. Vso'"— 7io"'. 



Gregarina Achetae abbreviatae Leidy: in Trans. Amer. Phil. Soc. 2. 

 ser. X. 238. Tab. XI. 32—34 et in Proceed. Acad. Philad. VIII. 

 (1856) 47. 



') Exceptis Monocystidibus hoc de Gregarinis oninibus valet. Stein. 



Ä ) Qiiod solum valet de Gregarina Lumhrici nee proboscide, nee reeeptaculo instrueta. 



