KEVISION OF PALEOZOIC STELLEROIDEA. 157 



PSEUDOPALASTERINA FOLLMANNI (StUrtz). 



Palasterina follmanni Sturtz, Palseontographica, vol. 36, 1890, p. 226, pi. 29, 



figs. 29-31a. 

 Pseudo palasterina follmanni Sturtz, Verh. naturh. Ver. preuss. Rheinl., etc.. 



vol. 56, 1900, pp. 219, 224. 



Actinall}^ this species lias ambiilacrals and narrow adambulacrals 

 and outside of the hitter the interbrachial and abactinal areas consist 

 of a membrane with small spine-bearing plates. It has no inframar- 

 ginal nor radial and supramarginal columns, features characterizing 

 Palasterina. 



Formation and locality. — Lower Devonic of Bundenbach, Germany. 



NEW GENUS. 



NEW SPECIES. . 



Prof. Weller got on Fountain Creek, at Waterloo, IlHnois, in the 

 St. Louis limestone, a small pentagonal asterid (No. 14396, Univer- 

 sity of Cliicago collection) shomng only the actinal side, that differs 

 from all other known forms of the large-disked genera. The five rays 

 are completely mthin the pentagon, with the interbrachial areas large 

 and straight-sided. These areas are made up of a few large tesselate 

 plates, of which it seems that seven compose the interbracliial mar- 

 gins and inside these there seem to be transverse rows, each with five, 

 three, two, and one ossicles. It could not be made out whether the 

 inframarginals and supramarginals are du-ectly superposed, but this 

 may be so. 



Ambulacral furrows exceedingly narrow, a mere line. These are 

 bounded by columns of large, very ornate adambulacrals, each wdth 

 seven ossicles. Those of opposite columns alternate decidedly with 

 one another and on its outer side each bears two short but dis- 

 tinct spines. 



Adambulacral oral armature in five very prominent pairs of pieces, 

 long and pointed, and about twice as long as any other adambulacrals. 



Measurements: R = 8.5 mm., r = 7 mm. 



Family LEPIDASTERID.E Gregory (emend.). 



Lepidastcridx Gregory (part), Geol. Mag., dec. 4, vol. 6, 1899, p. 352 (includes 

 Lepidasler and Etheridgaster); Treat. Zool., vol.3, Echinoderma, 1900, p. 255. 



Heliunthasterinse Gregory, Geol. Mag., dec. 4, vol. 6, 1899, p. 258. 



Helianthasteridse Sturtz, Verh. naturh. Ver. preuss. Rheinl., etc., vol. 56, 1900, 

 p. 204.— ScHONDORF, Jahrb. nassauisch. Ver. Naturk., Wiesbaden, vol. 63, 

 1910, p. 235. 



Primitive multi-rayed Phanerozonia apparently with the general 

 structure of Palajasteridse, but with as many as 24 rays. Madreporite 

 known only in IleliantJiaster, where it is interbrachial and on the 



