Bibliographical Notices. 159 



nearly three times as long as the width at the notch ; frontal 

 triangle elongate, continued considerably in front of the notch- 

 line. Teeth ^, slender, conical. The lower jaw rather slender 

 and slightly bent up at the tips; symphysis rather keeled 

 beneath in front. 



Inhabits the upper parts of the Amazon River near Santarem. 



The measurements are as follows, in inches and parts of 

 inches : — 



Male. Female. 



Length of skull 13 12 



of beak 7i 6^ 



of tooth-line 6 6f 



of lower jaw lOJ 9^ 



' of symphysis 2 If 



Width of skull 6 bl 



~ of beak at notch 2h 2^ 



of forehead over notch 4f 4 J 



Mr. H. W. Bates, in his letter of the same date, observes : — 

 " The Tucuxi, pronounced Tucoshee, is of a darkish black or 

 fuscous colour. It does not roll over like the Bouto, but comes 

 slowly to the surface to breathe." 



BIBLIOGRAPHICAL NOTICES. 



Manual of Geology y Practical and Theoretical. By John Phillips, 

 M.A., F.R.S. &c. Griffin and Co., London and Glasgow, 1855. 



The foundation of this work was laid twenty-five years ago, — in the 

 * Encyclopaedia Metropolitana,' — and, without changing its general 

 character, it has been enlarged and improved by the materials col- 

 lected by the author and numerous fellow-labourers in the same field 

 during the interval. Among the most important geological researches 

 of late years has been the examination of the older rocks of Wales 

 and the Border Counties, and the newer and not less interesting de- 

 posits of the tertiary series of Eastern England and the adjoining 

 Continent. The author has devoted considerable space to these sub- 

 jects ; and, by a careful condensation of the evidence brought forward 

 by the multitude of observers conscientiously enumerated in his pre- 

 face, has given us a lucid and valuable resume of paleeozoic and 

 cainozoic facts, which, together with the revised chapters on mesozoic 

 history, form a really useful Manual of physical and topographical 

 geology. Unlike many elementary works, this is far from being a 

 compilation ; for the author, without neglecting the observations 

 of others, has observed for himself, and brings us his own enlarged 

 and practical experience, — the fruit of years of scientific labour, both 

 under official engagements and as separate undertakings. The man 

 who has worked for himself in the field can best recognize the edu- 

 cational wants of others, and thus ofPer them the necessary elementary 

 knowledge by which the inquiring mind may be led in the right di- 

 rection to comprehend the philosophy of the closet and the facts of 



