REVISION OF PALEOZOIC STELLEROIDEA. 



Genus BOHEMURA Jaekel. 

 Text fig* 21. 



223 



Bohemura JAEKEL, Zeits. geol. Gesell., vol. 55, 1903, Protokol, p. 18 (111), fig. 6. 

 This genus, like the foregoing, is not defined in the regulation way. 

 Jaekel's fine drawing shows that it is closely related to Eophiura, 

 differing mainly in that the rays do not end bluntly, but have slowly 

 tapering whip-like terminations. These ends are of course ontoge- 

 netically young and reveal the progressive ray development. Here 



FIG. 20. ORAL SKELETON OB- EOPHIUEA BOHEMICA, AFTER JAEKEL. a, AMBULACRALIA; ad, ADAMBU- 

 LACRALIA; Ma, MADREPORITE AMONG THE SCALE PLATES. 



the rays are made up of overlapping and alternating adambulacrals 

 that distally have no ambulacral grooves. Gradually an ambulacral 

 groove is developed and it becomes rapidly wider as one examines 

 the rays more and more proximally, and the adambulacrals turn 

 over and flatten out, finally making the great open ambulacral 

 furrows. The illustration here reproduced, figure 21 on page 224, 

 will show the generic characters as drawn by Jaekel. 



Oenoholotype and only species. B. jahni Jaekel. Ordovicic (DJ 

 at Zahorzan, Bohemia. 



Genus PALvEURA Jaekel. 



Text fig. 22. 

 Palseura JAEKEL, Zeits. geol. Gesell., vol. 55, 1903,Protokol,p.l6(109)-17(110),fig. 5. 



Oenoholotype. Palseura, species not named. No species is again 

 mentioned, nor is it stated that the generic name is new. To give 

 the name standing, the form figured is here named P. neglecta, new 

 genus, new species. It occurs in the Ordovicic (D t ) of Bohemia; 

 the exact locality is not given, but may be Osek. 



50601 Bull. 88 15 15 



