TRANSLATOES' PEEFACE 



This translation of the first volume of Professor Lang's Lehrhuch cler 

 Vergleichende Anatomic may be considered as a second edition of the 

 original work. Professor Lang kindly placed at our disposal his 

 notes, collected for the purposes of emendation and expansion, and 

 they have been duly incorporated in the text. 



We did not think it necessary to increase the size of the book by 

 the addition of footnotes, either for the addition of new material 

 where it seemed to us that the account might with advantage be fuller, 

 or for calling attention to the opinions of other writers when these 

 did not happen to agree with that expressed in the text. In one 

 case a recent discovery (that of Jawarovski of antennae in the embryo 

 of Trochosa) lent such sudden and unexpected support to the mor- 

 phology of the Arachnoidea set forth in the text that attention was 

 called to it in a footnote. 



In carrying out our work as translators we have kept as close to 

 the original as the requirements of our own language would allow. 

 How far we have succeeded must be decided by those who know by 

 experience the difficulty of breaking down the long and weighty 

 German sentences, and of rearranging their contents into readable 

 English. We have endeavoured to steer a middle course between 

 the too free use of periphrases which suits the German style, and the 

 use of single technical terms which better suits the more concise 

 English sentence. The former style has, we think, some advantages 

 over the latter, so long as the multiplicity of words does not obscure 

 the meaning. There can be no doubt that it appeals more directly to 

 the understanding. The object of such a text^book as this is to 



