Counties of Durham and Northumberland. 465 



of Tunstall, and the German specimen was obtained from the 

 under layer of the Zeehstein of Ilmenau. 



35. EuLiMA SYMMETRICA, King. — In the "diagnosis'' given 

 by Mr. King, the general form of this shell is incorrectly stated 

 to be *' fusiform,'* There is no fusiform shell in the Permian 

 system that I am acquainted with, 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 been found yet in Germany. 



36. Chemnitzia Roessleri, Geinitz. — In the Tyneside Cata- 

 logue 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 striae." In King's ' Cat. Org. Remains of Per- 

 mian Rocks,' published two days after the above, I find no shell 

 described that can be identified with the C. Roessleri. 



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

 is affixed to a long train of names of Loxonema rugifera, and a 

 new specific name, as it is called, is very quietly appended, 

 and a " diagnosis " substituted, which would apply to a great 

 number of species ; and, in the remarks, an admission is made 

 that " imperfect specimens, about an inch in length, of a species 

 resembling Loxonema rugifera, Phillips, have twice occurred 

 to me; but through some accident, they have been mislaid." 



Ann, ^ Mag, N. Hist, Ser. 2. Vol. xix. 30 



