Klem — Revision of the Palaeozoic Palae'echinoidea. 69 



1892. Eocidaris Keyserlingi. Geinitz, Mitth. Osterlande 

 Naturforsch. Gesell. Altenburg, N. F., bd. 5, p. 178. 



1897. Eocidaris Keyserlingi. Spandel, Abbdl. Naturhist. 

 Gesell. Niirnberg, bd. 11, p. 33, taf. 13, figs. 1-6. 



1900. Eocidaris Keyserlingi. Hesse, Neu. Jahrb. Miner. 

 Geol. u. Pal., beil. bd. 13, p. 213. 

 Tubercles very small in loroportion to their scrobicules and 



distinctly perforated. No trace of crenulation. 



Primary spines apparently smooth, but in reality very finely 



striated. Spines swell abruptly at the base into a basal ring. 



A second kind of spine is broad with two sharp edges which 



are armed with sharp spinules directed upward. Very small 



secondary spines also found by Spandel.* 



Geological formation and locality : Unteren Zechstein, 



Corbussen and Ropsen, duchy of Altenburg, Germany. 



5. Eocidaris laevispinus Sandberger. 



. Cidaris laevispina. Sandberger, Verst. Rhein. 

 Schichtensystems, p. 382, pi. 35, fig. 2. 

 1858. Eocidaris laevispina. Desor, Syn., p. 156, tab. 21, 



figs. 18-21. 

 1862. Eocidaris laevispina. Dujardin et Hupe, Echinoder- 



mes, p. 467. 

 1874. Eocidaris laevispina. Loven, Kongl. Svens. Vetens. 

 Akad. Handl., Bd. 11, no. 7, p. 43. 

 Primary spines cylindrical and ornamented with about 

 twenty-three longitudinal ribs. These ribs are muricated 

 oppositely. 



Geological formation and locality: Devonian, Villmar, 

 duchy of Nassau. 



6. Eocidaris mijnsterianus De Koninck. 



1842. Echinocrinus Miinsterianus . De Koninck, Desc, 

 Anim. Foss. Carb. Beige, p. 35, pi. E, figs. 2 a-d. 



* Abhdl. Naturhist. Gesell. Niirnberg, Bd. 11, p. 37. 



