84 



Mr. T. R. Jones on Scandinavian Beyrichise. 



esting specimens. They consist of five fragments of a bluish-gray 

 limestone, full of organic remains ; one of them from near Berlin, 

 and the others from the neighbourhood of Breslau. (I shall 

 refer to them as Nos. 1, 2, 3, 4, & 5, for the sake of convenience.) 

 They differ somewhat among themselves in their lithological 

 characters and in their organic contents ; and no two of them 

 contain exactly the same set of Beyrichia. Nos. 1, 2, & 4 have 

 a weathered exterior of a whitish dun colour, in a more or less 

 friable condition. On fracture this whitish external portion of 

 the limestone exposes its fossils far more readily to the eye than 

 the inner crystalline limestone does ; and, indeed, the calcareous 

 cement having been decomposed, the innumerable BeyrichicB and 

 other minute fossils start away in the breaking up of the mass, 

 and may be readily picked out of the debris. Nos. 3 & 5 are 

 rather darker in colour than the others, and have a rough con- 

 cretionary structure. The weathered surface of these is not more 

 friable than their interior, and the whole readily brtaks up under 

 the hammer, numbers of thte little fossils becoming disengaged 

 among the debris. All the fragments contain Leptmm lata, 

 Nos. 1, 2, 3, & 4 are rich in this fossil, some of them contain 

 fragments of heads of Trilobites, and No. 1 abounds with Tenia- 

 culites also. No. 5 is poorer in the Leptmia, &c., and contains 

 Encrinital remains. Each of the limestones contains abundance 

 of Cythei'es or CytheropseSj the description of which is postponed 

 for the present. 



The relative distribution of these organic remains in each of 

 the specimens is shown in the following Table : — 



Limestone Specimens, Nos. 



Beyrichia Buchiana, n. sp. 

 B. tuberculata, Klod., sp. .. 



Var. nuda 



Var. antiquata 



B. Dalmaniana, n. sp 



B. Maccopana, n. sp 



B. Salteriana, n. sp 



B. Wilckensiana, n. sp. .. 



Var. plicata ........... 



B. siliqua 



B/lntindula " ".'.'.i.. 



Cytheres 



Leptaena lata 



Tentaculites 



Encrinital remains ........ 



Near Berlin. Near Breslau. 



1. 



- * 

 * 



[The asterisks by their-i^lative numbers denote the comparative abun- 

 dance of the fossils.] 



