Bevieivs — F. Springer — Cleiocrinus. 231 



already antiquated." Here the translator and editor might well 

 have assisted the student by inserting, in square brackets, references 

 to the more important works that supplement and in some instances 

 correct former views. To British readers this want is specially 

 noticeable in the accounts of the volcanic phenomena of the Inner 

 Hebrides (pp. 155-157) and in the references to South African 

 geology. 



Another serious omission is that of an index. With the 

 probability of three other volumes, and the possibility only of 

 "a fifth volume, consisting of index and geological maps," many 

 years must elapse before this first volume will be as useful as it 

 might and ought to be for reference. In other respects we have 

 nothing but praise for the care and pains bestowed on the translation 

 by Miss Hertha Sollas, and for the undoubted success with which, 

 aided by her father, Professor Sollas, she has so clearly and 

 faithfully expressed in English the ofttimes difficult language of 

 the original. 



The work contains in the introduction a sketch of the shapes of 

 the continents and oceans, together with remarks on great earth- 

 movements, on stratigraphical formations, and on the distribution 

 of life. The main portion of the volume is divided into two parts. 

 The first treats of the movements in the outer crust of the earth. 

 The Deluge is discussed as the greatest natural phenomenon of 

 which we have record. Delta deposits, earthquakes and volcanoes, 

 and the relations which may exist between the sensible movements 

 of the earth and the phenomena of dislocation, all receive notice. 



In the second part accounts are given of the structure and history 

 of a number of mountain chains — the Carpathians and the Alps, the 

 mountains of India and other parts of Asia, and those of America. 

 The basins of the Adriatic and the Mediterranean, the great deserts, 

 and other prominent features are dealt with. In short, a general 

 account is given of the structure of the earth's surface, and the 

 description of the continental masses is followed by a detailed 

 exposition of the difference which exists between the Pacific and 

 Atlantic basins. 



By using a slightly closer type the present work occupies 604 

 instead of 778 pages as in the original, but the print is clear and 

 excellent in all respects, while the text - illustrations and the 

 coloured maps are in no respect inferior, and in some cases much 

 clearer, than in the original edition. It is a handsome volume, and 

 is one which should find a welcome place in the library of every 

 working geologist. 



II. — Cleiocrinus. By Frank Springer. Mem. Mus. Corap. Zool. 

 Harvard, vol. xxv, pp. 93-114, one plate. (Cambridge, U.S.A. ; 

 January, 1905.) 



THE Ordovician genus Cleiocrinus, E. Billings, has always been 

 a puzzle to those whom Mr. Springer calls ' Crinologists.' The 

 structure of the stem and the lateral union of the arms have led 

 recent writers to refer it provisionally to the Flexibilia Impinnata 



