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, Abhdl. 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 proportion 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 Kopsen, duchy of Altenburg, Germany. 



5. Eocidaris laevispinus Sandberger. 



. Cidaris laevispina, Sandberger, Verst. Rhein. 

 Schichtensy stems, 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 munsterianus De Koninck. 



1842. Echinocrinus Miinsterianus, De Koninck, Desc, 

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



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



