192 WORKS AND PAPERS ON SPONaSS. 



Sponges may be found. The earliest writers quoted are 

 those upon whose figures and description Linnean and 

 Lamarckian species have been founded, and whose 

 writings, therefore, may be considered as entering into 

 the scientific bibliography of the class. 



Works and papers on fossil sponges are excluded, 

 except in a few cases where they contain references to 

 arrangement and recent species. 



The names of authors are arranged chronologically, 

 but when an author's name is once introduced all that 

 he is known to have subsequently written is given 

 after the name. 



