Klem — Revision of the Palaeozoic Palaeechinoidea. 17 



1875. Lepidocentrus Eifelianus. Quenstedt, Petrefact. 

 Deutsch., Bd. 3, Abth. 1, p. 374, tab. 75, figs. 

 14-17. 

 1896. Lepidocentrus eifelianus. Jackson, Bull. Geol. Soc. 

 Amer., vol. 7, p. 225. 

 Plates thin and quite round. Interambulacral plates scale- 

 like with rounded sides. Spines small, acicular, swollen at 

 the base. Most plates have one large tubercle, convex, per- 

 forated, with a smooth ring. 



Geological formation and locality : Devonian, Rommers- 

 heim. 



2. Lepidocentrus mulleri Schultze. 



186(3. Lepidocentrus Mulleri. Schultze, Denkschrift K. 



Akad. Wiss. Wien, No. 26, p. 124, tab. 13, fig. 1. 

 1874. Lepidocentrus Mulleri. Loven, Kongl. Svens. Vetens. 



Akad. Handl., Bd. 11, No. 7, p. 40. 

 1896. Lepidocentrus mulleri. Jackson, Bull. Geol. Soc. 

 Amer., vol. 7, p. 223, fig. 2. 

 Ambulacral areas composed of two columns of low narrow 

 regular plates, each perforated by two pores. Interambu- 

 lacral plates imbricating strongly adorally and laterally. In- 

 terambulacral plates nearly rhombic with one large primary 

 boss. Secondary spine bosses scattered over the surface j 

 Spines small, acicular and swollen at the base. 



Geological formation and locality: Devonian, Rommers- 

 heim near Prom, Eifel; Gerolstein, Eifel. 



3. Lepidocentrus rhenanus Beyrich. 



1856. Palaechinus rhenanus. Beyrich, Zeitschrift Deut. 



Geol. Gesell., Bd. 9, p. 4. 

 1856. Lepidocentrus rhenanus. Muller, Abhandl. K. Akad. 



Wiss. Berlin, p. 264, pi. 4, figs. 4-6. 



1874. Lepidocentrus rhenanus. Loven, Kongl. Svens. Vet- 

 ens. Akad. Handl., Bd. 11, no. 7, p. 40. 



1875. Palaeocidaris Rhenanus. Quenstedt, Petrefact. 

 Deutschl., p. 377, tab. 75, fig. 30-37. 



