X PREFACE. 



to his works would indicate. I stand in a relation of 

 similar, though of less extensive, obligation to the 

 systematic works of Professor Gegenbaur of Jena, of 

 Professor V. Cams of Leipzig, of Professor Claus of 

 Marburg, of Professor Bronn, and of Professor Kefer- 

 stein of Gottingen. I have also to make acknow- 

 ledgment to Professors Acland, Phillips, and West- 

 wood of Oxford, and to Albany Hancock, Esq., of 

 Newcastle-upon-T3me, for suggestions requested and 

 valued by me. In most cases in which other authori- 

 ties have been consulted upon points of importance, 

 special references have been given, except in the 

 Introduction. 



GEORGE ROLLESTON. 



