KORTHU.AIHERl.AND AND Dl'RIIAM. 277 



111 " Perm. Moii/' Mr. King places both the Tarritellce de- 

 scribed in the " Tyncside Catah:)giie" with his L. fasciata. This 

 would not have surprised me in the least, had he not imme- 

 diately afterwards (" Perm. Mon." p. 210) redescribed the 

 Turritella PhilUpsii under a new specific name, Loxonema 

 Geinitziana. That the shells described under both these names 

 are identical, cannot be denied by any one able to admit the 

 truth; and it is certainly much to be regretted that such an 

 oversight as this, and many others pointed out in this paper, 

 disfigure the fair pages of the " Permian Monograph." 



In the " Journal of the Dublin Geol. Soc," April 1856, Mr. 

 King mentions, under the name Rissoa? Altenhurgensis, Gein., 

 the occurrence of this little shell in the Permian rocks of Ire- 

 land. 



Lastly, in Germany, Baron Schauroth, in his last contribution 

 on Permian Fossils (Zeitschr. d. deutschen geologischen Ge- 

 sellschaft Jahrg. 1856, s. 241, 242), adopts for this species King's 

 inappropriate epithet, Geinitziana^ and unites with it the L. fas- 

 ciata, King, and the Turhonilla Altenburgensis, Geinitz. In the 

 same paper the Loxonema Geinitziana, King, is redescribed 

 under the new name Rissoa gracilis. I have been favoured by 

 Baron Schauroth with some carefully-made clay casts of these 

 shells, and I think they are perfectly identical with those from 

 the English Permians. 



All the shells enumerated above are, I believe, referable to 

 one species; and the name given to it by Geinitz originally must 

 be adopted until it is certainly known whether the Russian 

 species mentioned above are really identical. 



In addition to the characters given above under Turritella 

 PhilUpsii, it may be stated that in very many specimens the 

 whorls are very much flattened or bevelled, both above and be- 

 low, causing a deep suture, and the middle part of the whorls 

 to appear as if doubly keeled. In some few specimens, indeed, 

 there are indications of obsolete spiral strias, and Mr. Kirkby 

 has collected one specimen in which the last two whorls have 

 several very strong spiral striae, though the other whorls have 

 the smooth normal appearance only. This tendency of the 

 VOL. III. PT. rv. 1 L 



