266 NOTES ON THE PERMIAN SYSTEM OF 



not represent mine or any other species. Baron Scliaurotli, in 

 one of his excellent papers, identifies a German specimen with 

 Mr. King's description and figure ; but he found so little charac- 

 ter in the latter, that he was obliged to leave the matter in doubt. 

 Certainly the aS'. PhilUpsiana, Ki"gj is not worthy to be con- 

 sidered even a synonym. 



Two or three left-valves have been found in the shell-limestone 

 of Tun stall and Humbleton. 



2. S. BiA-RMicA, De Verneuil ? PI. XI. figs. 8, 9. 



" Shell transversely oval ; beaks not prominent ; posterior shorty 

 narrow y rounded; anterior elongated, rounded, much ivider than 

 the posterior ; surface slightly ivaved concentrically, plain ; muscular 

 impressions oblupiely placed, deep).'''' 



This species is very pointed posteriorly, and the anterior is much 

 produced and very broad. It is also much flattened, and all the 

 specimens I have examined are quite smooth. The German casts 

 are rather tumid, slightly arcuated, and have the valves rounded 

 and covered with strong lines of growth near the anterior mar- 

 gin. It is, therefore, still very doubtful whether all the shells 

 placed as synonyms in the Table are correct. 



I find that this shell is known in Germany under the above 

 epithet, and have in consequence adopted it. But Russian 

 specimens must be examined before this identification can be 

 positively determined. 



It remains to be stated that Mr. King also identifies this 

 species with the S. biarmica ; but the fi.gure given in the " Perm. 

 Mon.," pi. 16, fig. 7, represents no Solemya, but a young specimen 

 of the Myacites lunulata. 



I have taken specimens of the above shell at Whitley, in the 

 compact-limestone ; at Tunstall and Silksworth, in the shell- 

 limestone; and Mr. Kirkby has recently obtained a specimen 

 from Humbleton. 



21. AXmi^^, Son-crhj. 



1. A. DUBius, Schloth. 



Baron Scliaurotli has recently shown that the specific name 



