309] STUDIES ON GREGARINES— WATSON 99 



GREGARINA BLATTARUM Siebold 



Gregarina: Sporonts biassoeiative, rather stout bodied, more or 

 less irregular in outline. Length of sporonts 450 to 500/i. Width 185 to 

 200/1. Ratio length protomerite : total length primite : : 1 : 5 ; width pro- 

 tomerite : width deutomerite : : 1 : 2. Protomerite of primite cylindrical 

 in posterior two thirds, rounded anteriorly, no constriction at septum. 

 Very little wider than high. Protomerite of satellite flattened, wider 

 than protomerite of primite, twice as wide as high. Deutomerite irregu- 

 larly cylindrical, widest in posterior half of primite and in anterior half 

 of deutomerite. More or less pointed at posterior extremity. Sarcocyte 

 layer thick. Nucleus small, spherical, (44/x in diameter — deMagalhaes — ) 

 with from four to six l^aryosomes. Epimerite a simple hyaline knob. 



Cysts spherical or ovoidal. Spore ducts reach to outside of trans- 

 parent cyst cover. Spore ducts 8 to 10 in number. Spores cylindrical to 

 barrel shaped, truncate at ends, 8.5 by 3.7 and 4 by 8/i. 



Taken at Danzig, Berlin, Heidelberg, Bonn, and Leipsic, at Paris, 

 at Philadelphia, Pa. and at Rio Janeiro, Brazil. Hosts : Pefriplaneta 

 orientalis (L.) (Blattae or.); P. americana (L.) ; Blatella g irmanica 

 (L.) (Ectohia germ.). Habitat: Intestine. 



This is a remarkably cosmopolitan species, as seen from the loca- 

 tions where it was taken. It is remarkable also in that the name has re- 

 mained almost undisputed since its discovery. 



