XXXVIU PEOOEEDINQ-S OF THE 



sixteentli to the twenty-fifth, and the supplements were gradually 

 discontinued. The reason for having allowed them was probably 

 in order that the separate copies of long memoirs might retain the 

 original paging without the appearance of incompleteness. This 

 has now been accomplished by separately paging every article. 

 The typographical execution and illustrations have been gradually 

 improved, and in the last volume, the thirty-first (1864), the size 

 has been still further enlarged. The title has been slightly shortened 

 by the omission of the words " Physico-Medica" since the supple- 

 ments to the nineteenth volume, but is still inconveniently long 

 for references. The papers of the whole twenty-two volumes are 

 chiefly botanical or zoological, many of them long, and well known 

 from the separate copies distributed. They are also here and 

 there intermixed with a few in Mineralogy, Greology, Chemistry, 

 Astronomy, Optics, Meteorology, Ethnology, &c. 



The Proceedings of the Society for a long time were included in 

 the prefatory matter of the different volumes, then for a short 

 time published in Seemann's Bonplandia, and now form separate 

 quarto Numbers under the title of Leopoldina. They include a few 

 abstracts of papers and short reviews, besides the formal pro- 

 ceedings. 



The volummous publications of the E-oyal Society of Sciences 

 of GrOTTiNGEN needed not to have been here mentioned, but that 

 some botanical papers of Murray's and Schrader's in the older 

 series are not unfrequently quoted, and the present series has 

 been selected by Grrisebach for some of his contributions to sys- 

 tematic and descriptive botany, which are always too valuable to 

 be lost sight of. These, and a few zoological papers of Berthold's 

 on Amphibia, Reptiles, and Crustacea, are almost the only ones 

 connected with any branch of Biology in the whole set, on an 

 average about one paper for every two volumes. The diff'erent 

 series, all in 4to, many of them distinguished only by the most 

 trifling alterations in the title, are as follows : — 



1. Commentarii Societatis Eegiae Scientiarum Grottingensis, 

 4 vols. 1751 to 1754. 



2. Novi Commentarii Societatis Eegise Scientiarum Gottin- 

 gensis, 8 vols. 1769 to 1777. 



3. Commentationes Societatis Eegise Scientiarum Grottin- 

 gensis, 16 vols. 1778 to 1808. 



4. Commentationes Societatis Eegise Scientiarum Grottin- 

 gensis Eecentiores, 8 vols. 1808 to 1837. 



5. Abhaudlungen der konigiichen Gesellscbaft der Wissen- 



