RAYMOND: CORRELATION OF THE ORDOVICLAN STRATA. 211 



The Planilirabata limestone is described as being brownish red in 

 color, with green, violet, and yellow spots and streaks, thus reminding 

 one strongly of the same stratum on the Walchow. It is 3.5 meters 

 in thickness. A rather large fauna is reported, including, Pliomcra 

 actinura, Megalaspis planilimbata, Niobe lacviceps, Harpina excavata, 

 and Orthis christianiae, reminding one of the fauna which Lamansky 

 found at the top of the " Glauconite sand" at Papowka. 



The Limbatakalk is a lighter colored rock than the limestone below, 

 and may be gray. It has a thickness of 5,45 meters. Megalaspis 

 Umhata and other fossils are present. 



The Expansuskalk is known from boulders which contain many 

 fossils, including the typical Asaphus expansus, A. raniceps, Megalaspis 

 acuticauda, M. hews, Lycophorixi nucella, etc. 



The Gigaskalk is represented by a single boulder. 



The Platyuruskalk is usually found as boulders of red limestone, 

 and along with Asaphus platyurus contains many cephalopods, such 

 as Orthoceras conicum, Vaginoceras icahlenbergi, Lituites lituus, etc. 



The Chiron kalk is found in boulders, sometimes containing "lin- 

 sen." The fauna contains Asaphus kowaleivski, A. cornutus, lUaenus 

 chiron, I. schmidti, and Christiania oblonga, and distinctly suggests 

 the C] of Russia. 



The older Chasmopskalk is lithologically like the Chironkalk, and 

 in the boulders are found Porambonites schmidti, Plafystrophia lynx, 

 Christiania oblonga, Echinosphaerites, Ptilograptus suecicus, Climaco- 

 graptus, and Diplograptus. 



The boulders assigned to the younger Chasmopskalk or Macrourus- 

 kalk contain among others, Chasmops maxima, lUacnus fallax, I. 

 oblongatus, Porambonites ventricosus, and Platystrophia lynx. 



Boulders of the so-called " Ostseekalk," also occur which, in the 

 North Baltic area, is partly fine-grained "lithographic stone" com- 

 parable to the Wesenberg limestone of Esthonia, while other boulders 

 are of a different sort. 



Wiman lists the fossils found in a large number of these boulders, 

 which would seem to have been derived from formations very similar 

 to the Kegel, \Yesenberg, Lyckholm, and Borkholm of Esthonia. 



Interesting species are Chasmops wcscnbcrgensis, Encrinurus scc- 

 bachi, Lichas eichicaldi, and Clitambonites wesenbergensis, all of which 

 occur in the Wesenberg at Wesenberg. 



Cyclocrinites schmidti and C. balticus of course suggest the Kegel, 

 while Platystrophia lynx and Oxoplecia dorsata occurring together, 

 remind one of the Kuckers. 



