SOME OBSERVATIONS ON A NEW GREGARINE. 261 



Some Observations on a New Gregarine (Meta 

 mera scliubergi nov. gen., nov. spec). 



By 

 H. L,yiidliui»t Duke, B.A., B.€.€aiita1»., 



With Plates 15 and 16. 



Contents. 



Introduction .... 



Material and Methods 

 Structure of the Trophozoite 

 Cyst-formation and Develoi)ment of the Spores 

 Discussion of Some Special Points in the Life-cycle^ 

 Diagnosis of Metamera schuhergi . ' 



Literature References 

 Explanation of Plates 



Introduction. 



PAGE 



261 

 263 



266 

 270 



278 

 282 

 282 

 284 



While workinsr at Heidelbercr in 1906, under Professors 

 Butschli and Schuberg, the latter kindly called my attention 

 to a new species of gregarine in tlie gut of Glossosiphonia 

 complanata L, (Clepsine sexoculata), and suggested its 

 further investigation. The preceding summer, while busied 

 with a recently discovered coccidium occurring in the leech 

 Herpobdella atomaria Car. (= Nephelis vulgaris), 

 Professor Schuberg turned his attention to Glossosiphonia 

 complanata, which occurs in company with Herpobdella 

 in the Neckar and occasional ponds in the Heidelberg district. 

 Deeming it probable that two forms so alike in habit and 

 environment might harbour the same parasites, be dissected 



