51 {49) Appendage of bursa muscular; rhabdites present; variegated coloring from dissolved pigment and yellow to 

 brown granules (Fig. 104) Genus Paramecynostomum. 



Figure VM.— Paramecynostomum diversicolor. 



5 1 (49) Appendage of bursa cellular; rhabdites absent; no dissolved or granular pigment (Fig. 105) 



Genus Postinecynostomum. 



Genus LimnoposthiaJ' 



Figure 105a.— Poslmecynoslomum picium. 



Figure iOSb.—Limnoposthia polonka. (See next page and text foolnole 6.) 



*The genus Limnoposlhia (Kolasa and Faubel 1 974) was placed lenlalively by the authors close lo Conmliila. bul it seems to me the illustrations and descriptions of the penial structures would 

 lead a user of this key to a position close to Puslmccymislmmum. The structure of the penis in the illustration of Limnoposlhia polonica suggests the glandular penis of Poslmecynoslomum and the 

 pan labeled "vas deferens" may conespond lo the enclosed seminal vesicle of the Mccynostomidae, Study of actual specimens is needed to clear up this point. From freshwater lake in Poland. 



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