BY THE SAME AUTHOR. 



ON THE STRUCTURE AND AFFINITIES OF THE 



" Tabulate Corals" of the Palaeozoic Period. 



With Critical Descriptions of Illustrative Species. Illustrated with Engrav- 

 ings on Wood and 15 Lithographed Plates. Royal 8vo, 2is. 



"A magnificent octavo volume, which we have no hesitation in pronouncing the 



best of all the author's numerous works It is impossible to overlook the many signs 



of the most careful work displayed in this portion of Dr Nicholson's book; and al- 

 though, as we have seen, he is compelled by the very nature of the objects of his study 

 to leave many points in a state of uncertainty, which, indeed, may perhaps never be 

 cleared up, yet in his present volume he has made our knowledge of these puzzling 

 organisms take a great step forward. In the matter of illustrations, also, we are here 

 in a condition of magnificent luxury." — Papular Science Revieii'. 



"Whatever future discoveries may disclose as to the affinities of these corals, this 

 work will always retain a permanent value for its minute and faithful description of 

 these organic remains, and all students of Palaeontology will be indebted to Professor 

 Nicholson for thus bringing together in a single volume the history of this important 

 division." — Geological Magazine. 



A Manual of Palaeontology, for the use of stud- 

 ents. With a General Introduction on the Principles of Paleontology. 

 Second Edition, Revised throughout, and greatly enlarged. Illustrated 

 with 722 Engravings. Two Volumes, 8vo, 42s. 



" The most complete and systematic treatise on the subject in the English language. 

 It has not only been thoroughly revised, and to a great extent rewritten, but so much 

 enlarged by the addition of new matter that it may claim to be considered to all in- 

 tents and purposes a new book." — Saturday Review. 



" Professor Nicholson has placed all geological and most zoological students under 

 a great obligation by the masterly way in which he has collected, arranged, and clas- 

 sified the facts of the most difficult of modern sciences, palfeontology. No library of 

 natural science can afford to be without the present work." — Science Gossip. 



WILLIAM BLACKWOOD & SONS, Edinburgh and London. 



