-320- 



Palaeontologie. 



2. Familie Cystoblastidae. Cystoblastus v. Volb. 



3. Familie Scoliocystidae. Echinoencrinües H. v. Meyer, 

 Gonocrinites Eichw., Sycocystites v. Büch, Prunocystites Forb., 

 Erino cystis n. g., Glaphy rocy stis n. g., Scolio- 

 cystis n. g., Schizocystis Jaekel. 



Fig. 1 G — M. Theca der regulären Dichoporita. G Pleurocystites BILL. , H Glyptocystites 

 BILL., 1 Erinocystis n. g., K Glaphyrocystis n. g., L Schizocystis n. g., M Callocystites HALL. 



4. Familie Pleurocystidae. Pleurocystites Bill. 



5. Familie Callocystidae. Lepocrinites Conr., Pseudocrinites 

 Pearce, Apiocystites Forb. 1 , Callocystites Hall, Glypto- 

 cystites Bill, typus, Sphaerocystites Hall, Staurocystis Haeck., 

 Anthocystis Haeck. 



1 Apiocystites Gebhardt stammt aus dem Unterdevon ; der Penta- 

 raerws-Kalk der unteren Helderberg-Gruppe wird allgemein zu dieser For- 

 mation gerechnet. 



