Lti? 



ADVERTISEMENT. 



THE present Translation was undertaken as a contribu- 

 tion towards the supply of a want of information, felt 

 and acknowledged in this country, respecting the la- 

 bours of Continental Naturalists, and especially those of 

 Germany. In sending it forth so long after its an- 

 nouncement, the Translator feels that an apology is 

 due to his Subscribers ; but his undertaking has met 

 with an encouragement insufficient to render it probable 

 that the publication of the work can pay its cost. 

 Should it, however, obtain this measure of success, he 

 wil] feel pleasure in devoting some portion of his time 

 to the translation of future Reports. He has already 

 received a reward which he cannot too highly prize, 

 in being brought into communication with the able 

 and kind friend who has devoted a portion of his va- 

 luable time to the revisal of the work during its pro- 

 gress. 



In the translation, the German has been closely ad- 



M37H1O 



