234 BULLETIN 88, UNITED STATES NATIONAL MUSEUM. 



Genoholotype and only species. G. spryi Chapman (same references 

 as above). 



Found in the Siluric (Melbournian) shale at South Yarra, Vic- 

 toria, Australia. 



Genus BUNDENBACHIA Sturtz. 



Text fig. 27. 



Bundenbachia STURTZ, Palaeontographica, vol. 32, 1886, p. 83; vol. 36, 1890, 

 p. 216. GREGORY, Proc. Zool. Soc. London for 1896, 1897, p. 1033, fig. 4 

 on p. 1034. PARKS, Trans. Canadian Inst., vol. 8, 1908, p. 367. SCHON- 

 DORF, Palseontographica, vol. 57, 1910, p. 57. 



Rays five, short, basally wide, terminally pointed or blunt. Disk 

 large, soft and delicate, with concave interradial margins. 



Abactinally the disk is covered with symmetrical scales, and 

 medially there is a pentamerous rosette (the oral armature squeezed 

 through), from the points of which the rays originate. Rays covered 



with a granular integument. 



Gregory states : "Ambulacral ossicles with 

 a dumbbell-shaped body and thin tapering 

 wing. The body of the ossicle is apparently 

 divided into two pieces by a transverse de- 

 pression. The adambulacral plates are small 

 an( * narrow > an d support a triangular spine- 

 bearing plate. [There is only one plate here, 



FIG. 27.- VENTRAL ABM STRTTC- L J > 



TURK OF BUJNDENBACHIA. EN- the adambulacral. I here are no lateral 



LARGED. AFTER GREGORY. pieces as in Ophiuroidea.] 



"The syngnaths are curved, narrow bars." 

 Genoholotype and only species. B. beneckei Sturtz. 

 Remarks. " Bundenbachia differs from Protaster by the irregular 



nature and soft plating of the disk, by the presence of spine-bearing 



plates attached to the adambulacral ossicles, and by the different 



form of the ambulacral ossicles." (Gregory.) 



BUNDENBACHIA BENECKEI Sturtz. 



Bundenbachia beneckei STURTZ, Palseontographica, vol. 32, 1886, p. 83, pi. 8, figs. 7, 

 7a; pi. 9, figs. 1, la. GREGORY, Proc. Zool. Soc. London for 1896, 1897, p. 

 1034, figs. 4. 



Formation and locality. Occurs in the Lower Devonic roofing 

 slates of Bundenbach, Germany. 



Genus PAL^EOPHIOMYXA Sturtz. 



Palseophiomyxa STURTZ, Verb, naturh. Ver. preuss. Kheinl., etc., vol. 56, 1900, 



p. 202. 

 Palxophwmyxidx STURTZ, Verh. naturh. Ver. preuss. Kheinl., etc., vol. 56, 1900, 



p. 202. SCHONDORF, Jahrb. nassauisch. Ver. Naturk., Wiesbaden, vol. 63, 



1910, p. 235. 



Genoholotype and only species. P. grandis (Sturtz). 



