BRESLAU ON THE OCCURRENCE OF OZOKERITE. 59 



'Jena Literatur-Zeitung,' 1848, 654; and in many respects adds 

 much, to a knowledge of the animal. He accepts Goldfuss' view that 

 the osseous apparatus, posterior to, and in connexion with the skull, 

 belongs to the bone of the tongue ; and quotes also Goldfuss' words, 

 that the Archegosaurus, by the presence of scales, affords a proof, 

 that there existed, in the case of the mailed reptiles of the ancient 

 world, representatives of a regular larval state ; just as in the case of 

 the Batrachians we have the fish-reptiles of the present day. 



The Sclerocephalus Haeuseri, Goldfuss, lastly, appears to the au- 

 thor to agree in the formation of its head, even more than the Ar- 

 chegosaurus, with the Labyrinthodons, and must therefore also be 

 numbered amongst the Saurians. [T. R. J.] 



On the occwrrewceo/ Ozokerite in the Wettin Coal District. 

 By Herr Breslau. 



[Karsten's Archiv fiir Mineralogie, Geognosie, u. s. w., B. xxiii. H. ii. pp. 749-751*, 



1850.] 



The occurrence of the Ozokerite in the Wettin coal district is con- 

 fined to a cleft found in the Neutzer Zuge, in the year 1848, in the 

 farthest shaft of the Burghofer pits, at 23^ to 24f fathoms, and 

 some neighbouring clefts, in the sandstone that is situate between 

 the shelly schist, forming the uppermost beds of the coal formation, 

 and the limestone that overlies the uppermost coal bed. The sand- 

 stone alternates above with a clayey rock, and below with a calcareous 

 claystone ; and is characterized by its greenish-grey colour, its fine 

 grain, its clay partings, and by its general want of mica. As an 

 exception, that portion of it, which is otherwise altogether free of 

 intervening laminae, contains a trifling layer of reddish-brown clayey 

 sandstone. 



The cleft begins at f of a fathom above the brownish-red sandstone 

 layer, passes through it, and terminates at the uppermost bed of the 

 calcareous claystone, at 1^ fathom above the upper coal bed. Its 

 strike is hor. 2, 2 ; and its dip is about 80° E.S.E. 



The sides of the cleft are covered with calc-spar, which is here and 

 there crystallized in druses, and on the sides near the middle of the 

 cleft is generally beset with small crystals of sulphur-pyrites, — hexa- 

 hedral iron-pyrites, Mohs. The remainder of the cleft is occupied 

 with the Ozokerite. 



The cleft is very unequal in size ; sometimes it expands to half an 

 inch, and is sometimes contracted to \ inch. This circumstance, on 

 account of the laminated texture and symmetrical arrangement of the 

 contents of the cleft, acts in suchwise on the variable quantity of ma- 

 terials present, that towards the middle of the cleft the Ozokerite is 

 almost absent ; and, whilst the mass of Ozokerite attains a thickness 

 of \ inch where the cleft has its greatest width, the cleft at its nar- 

 rowest portions is occupied with calc-spar only. 



The small neighbouring clefts, running parallel to the chief cleft, 

 exhibit similar contents, having a similar symmetrical arrangement 

 * Accompanied in the "Archiv" by an illustrative Section. 



