274 NOTES ON THE PERMIAN SYSTEM OF 



and Mr. King's own figures do not represent it as such. More 

 correctly, the general form is subulate, as the front portion of 

 the mouth is much the broadest part of it. The surface appears 

 to be smooth. The spire is produced to a fine point, and the 

 very oblique suture is closely pressed in, and is not folded over, 

 as in those shells which are generally referred to the vague genus 

 Macrocheilus. Some specimens show broad bands of colour 

 arranged as on some of the recent Eulimce. 



The meagre description of this good species, and the unsatis- 

 factory figures of the " Perm. Mon.," have led Baron Schauroth 

 to suppose that it may belong to one of the following species ; 

 but the general form of the shell is too characteristic to allow 

 of this conclusion being permanently entertained. It attains 

 sometimes to more than an inch in length. 



In the shell-limestone of Tunstall, not very common ; also in 

 the same deposit at Humbleton and Silksworth. It does not 

 appear to have yet been fonnd in Germany. 



31. CHEMNITZIA, i)'6>rZ'/^«v/. 

 1. C. RoESSLERi, Geinitz. 



In the " Tyneside Catalogue" I gave the first account of a 

 fragment of a plicated shell, which evidently belongs to the 

 above, in the following words : — 



" Chemnitzia. — We procured a fragment of a small shell 

 from Tunstall Hill, which possesses more of the characters of 

 this genus than of any other we are acquainted with. It has a 

 few gradually-increased whorls, which are very convex and deeply 

 fluted. The suture is deep, and the pillar straight. This may be 

 the shell included in the tabular list of the ' Geology of Russia' 

 as Loxonema rugifera. It cannot, however, be referred to that 

 species, nor to the genus Loxonema, as the suture is deep, and 

 not pressed against the former whorl, as in that genus. It is 

 also destitute of stria}." 



In King's " Cat. Org. Remains of Permian Rocks," published 

 two days after the above, I find no shell described or referred 

 to that can be identified with the C. Roessleri. 



In the " Perm Mon.," however, the Chemnitzia noticed above 



