EXTRACTS AND ABSTRACTS FROM FOREIGN JOURNALS. 215 



The occurrence in later years, of similar formations near Sabor and 

 Freiberg, has also excited considerable attention, and these substances 

 have been exhibited to the Academy. 



In order to determine how far this meteoric paper may have been 

 brought, by perhaps some hurricane, before it fell in Courland, and 

 whether it may not have been brought from a very distant part of the 

 earth, the reporter, in his account of it, desired that the old collections 

 in Breslaw might be searched for larger masses of the substance, in or- 

 der to ascertain whether flowers or seeds of some known plants might 

 not be interwoven with these leaves, which is said to have been the 

 case originally, from which the true origin of this substance might with 

 certainty be ascertained. 



Prof. Goppert, correspondent of the Academy, has undertaken this 

 scientific task, and has hitherto been unable to find in Breslaw any 

 more of the paper of 1686 ; but he has discovered in the library of St. 

 Bernhardin, two large pieces of natural paper, from which he surmises 

 that they originated in the misfortune of 1736. This mass, which is 

 composed of interwoven Conferva and grass leaves, is about 34 feet 

 long, and from 2 to 3 feet wide ; on one side smooth and of a brownish 

 ash-grey colour, and on the other of a greenish red -brown. This latter 

 side is loosely interwoven with grass leaves, and has entangled in it 

 small shells of the genus Planorbis, arid other remains of minute aquatic 

 animalculse. The grey side is more compact, like grey blotting-paper, 

 and contains small grass leaves. The grey smooth side is clearly the 

 upper, and is somewhat bleached by exposure to the rays of the sun. 

 The looser, green side is the under one, which had been in contact 

 with the grass of the meadow. (For the microscopical analysis of this 

 substance, see p. 59, Vol. II. of this Journal.) 



Werneck's Microscopical Observations and Descriptions of New Genera 

 of Infusoria. At the sitting of the Berlin Academy, Nov. 25th, 1841, 

 M. Ehrenberg presented to the Academy, by desire of Dr. Werneck of 

 Salzburg, an extensive series of new microscopical observations upon 

 descriptions of Infusoria. 



These observations first allude to the little that has been done, for 

 the last eleven years, in the advancement of our knowledge of the true 

 anatomy of these beings. They are considered by M. Ehrenberg to be 

 extremely accurate and important ; and at the end of the account is 

 given a list of some new genera of Infusoria of both classes, which we 

 have subjoined : 



I. POLYGASTRICA. 



I. CALIA. Nestermonade. 



Char. Gen. Monades gelatina inclusse (Pandorinae) plantis aqua- 

 ticis affixae, nee libere natantes. Duae species. 



II. ERETES. W. Rudermonade. 



Char. Gen. Phacelomonades loricatae. Una species. 



