



MONOGRAPH 



ON 



THE CIREIPEDIA. 



INTRODUCTION. 



My former volume, published by the Ray Society, 

 treated ouly of the Lepadidse, one family of the Cirripedia : 

 I was induced to print it from having the materials ready, 

 though this partial publication has been in some respects 

 inconvenient. The Palaeontographical Society has done 

 me the honour to publish, with ample illustrations, the fossil 

 species of this same family of Lepadidse. This present 

 volume completes my work on the sub-class Cirripedia.* 

 I had originally intended to have published a small volume 

 on my anatomical observations ; but the full abstract given 

 in my former volume, which will be illustrated to a certain 

 extent in the plates appended to this volume, together with 

 the observations here given under the BalanicloC, appear to 

 me sufficient, and I am unwilling to spend more time on 

 the subject. In the volume on the Lepadida?, I gave the 

 specific or diagnostic characters in English and Latin : 

 I have here left out the latter, inasmuch as I have appended 

 at the end of this volume a Latin Synopsis of all the 



* The number of the British fossil species of the Balanidse and Verrucidre in a 

 recognisable state is so small, that I do not know whether it will be considered 

 worth while to publish in the Palaeontographical series more detailed illustra- 

 tions than are given in this volume. 



&. ft? *"*■ * : 



