Bibliographical Notices. 319 



catalogue of dry bones ; though even liad it. been no more than 

 this, from the extraordinary character of these bones the 1)ook he 

 has just finished would have been one of exceptional importance : 

 and this because, for the most ])art, the remains which he describes 

 are missing links for which palieontologists and students of phylo- 

 geny have long been seeking, desiring without hope. 



Though Dr. Andrews had not, in many cases, the good fortune 

 to unearth the first specimens of these remains to be discovered, it 

 is to him tluit we owe their determination : to him that the credit 

 belongs of interpreting the true nature of the puzzles they presented. 

 But he has himself done much work in the burning deserts of 

 Egypt, and many of the most important remains described here are 

 due to the masterly intuition he displayed in the arduous w^ork of 

 fossil-hunting ; many of the biggest prizes were obtained from 

 ground that others on the same quest had already surveyed and 

 pronounced barren ! 



The grealer part of this volume is concerned with that most 

 important group, the Ungulates ; and, undoubtedly, the most 

 striking of these is the bizarre creature which lias been named 

 Arsciioitlierium. A considerable number of bones, including skulls, 

 of tiiis animal have been obtained, representing different ages, so 

 that, as Dr. Andrews remarks, " this extraordinary mammal is now 

 almost completely known, so far as this is possible from the bones 

 alone."' 



In general appearance somewhat resembling a large and heavily 

 built rhinoceros, it differed therefrom in having an enormous pair 

 of horns placed side by side above the nose and a smaller pair 

 above the eyes. From the corrugations on the surfaces of these 

 cores it would seem certain that they were ensheathed in horn ; 

 and in (his, of course, ArsinoitJieriam differed fundamentally from 

 the lihinoceros ; while, from their dentition and other cranial 

 characters, it would ajipear that these ponderous animals are 

 descended from the same ancestral stock as the Hyracoidea. 



The great feature of this Catalogue, and of Dr. Andrews's work, 

 is, however, the section devoted to the Troboscidea. Hitherto the 

 origin and evolution of this group has been shrouded in mystery : 

 to-day the veil is lifted. It is no small thing to have done this ; 

 and those who will turn to the pages of this work will find that 

 Dr. Andrews has brougbt to bear upon his task a subtilty of 

 analysis and a grasp of complicated facts that most of us can but 

 envy. 



Till now one of the strongest and most telling object-lessons in 

 the Evolution Theory has been furnished by the Horse ; but 

 Dr. Andrews has now provided an even more striking piece of 

 evidence. To attempt, even in outline, to describe the nature of 

 this evidence would be impossible in the space at our disposal ; for 

 the author's discoveries do not end here, and of these other achieve- 

 ments we must also speak. The most important of these concerns 

 his contentions with regard to the origin and evolution of the 

 Sirenia, which he holds are to be regarded, as De Blainville sug- 

 gested years ago, as intimately related to the Proloscidea. But 



