Klem — Revision of the Palaeozoic P'llae'echinoidea. 37 



7. Palaechinus sp. Tornquist. 



1897. Palaechinus sp. Tornquist, Abhdl. Geol. Karte 

 Elsass-Lothr., Bd. 5, Hft. 6, p. 763, taf. 20, fig. 6. 

 Geological formation and locality: Carboniferous, Huns- 

 riickenwald, Elsass, Germany. 



c. Oligoporus Meek and Worthen I860.* 



From five to nine columns of plates in each interambu- 

 lacrum, and four columns in each ambulacrum. Two pores 

 in each ambulacral plate. 



1. Oligoporus danae Meek and Worthen. 



1860. Melonites Danae. Meek and Worthen, Proc. Acad. 



Nat. Sci. Phil., p. 397. 

 1860. Oligoporus Danae. Meek and Worthen, Proc. Acad. 



Nat. Sci. Phil., p. 472. 

 1866. Oligoporus Danae. Meek and Worthen, Geol. Surv. 



111., vol. 2, p. 249, pi. 17, fig. 8. 

 1874. Oligoporus Danae. Loven, Kongl. Svens. Vetens. 



Akad. Handl., bd. 11, no. 7, p. 42. 

 1889. Oligoporus danae. Miller, N. Amer. Geol. Pal., p. 



263, fig. 373. 

 1894. Oligoporus danae. Keyes, Mo. Geol. Surv., vol. 4, 



p. 126, pi. 17. figs. 2 a, b. 

 1894. Oligo])orus bellulus. Miller and Gurley, Bull. No. 3 



111. State Mus. Nat. Hist., p. 7, pi. 1, fig. 3. 



1894. Oligoporus blairi. Miller and Gurley, Bull. No. 3 111. 

 State Mus. Nat. Hist., p. 6, pi. 1, figs. 2, 6; pi. 2, 

 fig. 7. 



1895. Oligoporus danae. Keyes, Proc. Iowa Acad. Sci., 

 vol. 2, p. 182, pi. 20, figs. 2 a, b. 



1896. Oligoporus danae. Jackson, Bull. Geol. Soc. Amer., 

 vol. 7, p. 193, pi. 6, figs. 30-34. 



Test large, subglobose. Interambulacral areas lance-ovate. 



Proc. Acad. Nat. Sci. Phil., I860; p. 474. 



