of North America with those of Europe. 



219 



TABLE 



Of the species common to 

 Europe and North Amer- 

 ica and of the subdivi >n 

 of the palaeozoic forma- 



Lovver Silurian. 



j* 



© 



3 

 3 



tion in which they occur 



u 



Holoptychua nohilissimua 

 Teeili of J >< rulrodua. 

 Asterolepis ? 



Calymene Blumenbochii. 



" \:.r. smaria. 



" Fttcheri. 



punctata, 

 lllamus crasaicauda. 

 I.ichas lacimata. 

 '"eraurua plcnrcx'mus. 

 TrinucleuH carac: i. 

 Phacup* Ilausmanni. 



M Dalmani. 



*' limulurus. 



macrophthalmua. 

 ^ryphams cnllitrlea. 

 Biimastua barriensis. 

 Homalonotus dolphin's. 

 Cheirurus insitrms. 



Sptaatexochui minis. 



Agnostua larus. 



J nilhp.sm aeminifera. 



Orthocerames communis, 



annuhaus. 

 j. . calamus. 



'""it's convolvans. 

 <*oniatitea mtntoriua. 



M 



v retrorma. 



•>a.itiluatubcrrulaiu8. 



wllemphon hiulcus, 



stnatus. 

 Jrn. 



bilobatua. 

 P1 dilatatU8. 



^^irotomaria lenticuiaria, 

 «ubul,ret slongai 



Momphalua carbonariut. 



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 8 



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^acrochoiluH curvilmeus 



^emrntzm nexilia. 

 ^urch.snn.abiiinoata. 

 Avicula damnoniensis. 

 ; ,e nnea fasncuhua. 

 j«odiola sqn immiiera. 

 i 1 } wiischemunftnaia. 



Luci 



urn loncatum 

 r »a proavia. 



r rugosa. 



'™<nm> a l.amiitonenaw. 

 2*pg«moIaria dorsmta. 



Alloriama sulcata. 

 J erebratula cboides. 



d a. 







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cuneata. 

 marginalia, 

 reticularis, 

 nspera. 



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