INCERTAE SEDIS. 



451 



Palaechinus konincki [by clerical error] Dujardiu and Hupe, 1802, p. 464; (non Palaeckinus konincki 

 Julien, 1896, p. 130, for which see the next species, Palaeechinus (?) regnyi; non Fraipont, 1904, p. 

 9, Plate 3, fir. 1); (pars) Klein, 1904, p. 33. 



Pahwechinus (?) konigi Loven, 1874, p. 11. 



Xystria koenigii Pomel, 1S83, p. 114. 



Palaechinus koenigi Julien, 1896, p. 129. 



Non Palechinus koninchi Tornqiiist, 1897, p. 753, for which see Palaeechinus (?) reqnyl. 



Palaechinus kihiigl Lambert and Thiery, 1910, p. 119. 



This species is known only from a few dissociated interambulacral plates with tubercles. 

 It doubtless belongs in the family Palaeechinidae, but nothing further can be said. It certainly 

 has been burdened with names and various .spellings. The specimen is a dark mass (not in a 

 yellow sandstone as Miss Klem states) from the Lower Carboniferous of Rahan's Bay, Dunki- 

 neeley, County Donegal, Ireland. The holotype and only known specimen is in the Griffith 

 Collection, Science and Ai-ts Museum, Dublin, where I saw it 

 through the kindness of Dr. Scharff. 



The fact that Dujardin and Hupe by error listed this species as 

 P. konincki and that Julien described a new species as P. konincki, 

 has made confusion between this and the next species to which I 

 give a new name. P. (?) konigii is the type and only species 

 referred to Xystria by Pomel, who is the author of that genus. 



Palaeechinus (?) regnyi nom. nov. 

 Text-fig. 253. 



Pahin-hinus kunincki (name preoccupied) Julien, 1896, p. 130, Plate 10, 



fig. 20; Plate 11, fig. 27; (pars) Klem, 1904, p. 33; Fraipont, 1904, 



p. 9, Plate 3, fig. 1; (non Palaechinus konincki Dujardin and 



Hupe, 1862, p. 464, for which see Palaechinus (?) konigii, p. 450). 

 Palechinus konincki Tornquist, 1897, p. 753. 



On account of the confusion in the nomenclature of this species, 

 it seemed best to give it a distinctive name as is done. As the 

 ambulacral structure is unknown, one cannot state to which genus of 

 the Palaeechinidae this species belongs. According to Julien, the 

 specimen is 90 mm. high and approximately 55 mm. wide. This 

 width as given refers only to the width of the interambulacrum, 

 not to what the whole specimen would be if complete. The adambu- 



253 



Text-fig. 2.53. — Palaeechinus 

 (?) regnyi nom. nov. Lower 

 Carboniferous, R6gny, France. 



lacral plates are pentagonal, others hexagonal, with numerous Natural size. After Julien, 1896, 

 secondary tubercles, which, Julien says, on the adambulacral ^''''te lO, fig. 20, drawn from his 



rather indistinct photograiihic 



plates are arranged in horizontal series. Julien qualifiedly says figure. 



