VERTEBRATE PALAEONTOLOGY IN 1910 669 



one of the constituents. The article is pubhshed in the Bull. 

 Amer. Mus. Nat. Hist., vol. xxviii. pp. 43-72. The family 

 Ischyrotnyidce includes the five genera Ischyromys, Paramys, 

 Scmravus, Mesops, and Prosciurus. The family is considered 

 to belong undoubtedly to the Sciuromorpha, among which it 

 is classed, together with the existing Haplodontidce and the 

 extinct Mylagaididoe, in the group Haplodontoidea (or Aplo- 

 dontoidea), while the Sciuroidea is taken to include the 

 Sciuridce, Castoridce (with Castovoididce) and Geomyidce (with 

 Heteromyidce). The inclusion of the Geomyidce in the Sciuroidea 

 is a new departure, as is also the reference of the extinct 

 Meniscomys and Mylagaulodon to the Haplodontidce. 



On the other hand, the primitive Tertiary families Theri- 

 domyidce and Pseiidosciuridce, although closely related to the 

 Ischyromyidce, are classed, together with the modern Anomal- 

 uridce, in the Hystricomorpha. The first, at least, of these 

 families appears to have undoubted hystricomorphine affinities, 

 and must be regarded as approximately ancestral to the group, 

 in spite of the difficulties in accounting for the geological and 

 geographical distribution of the known members of the Theri- 

 domyidce and Hystricomorpha. In this classification Dr. Matthew 

 follows the one proposed by myself in the British Museum 

 " Catalogue of Fossil Mammalia." 



The first paper on ungulates for notice is one by Dr. Max 

 Hilzheimer, published in the Hanoverian journal Jahrb. Wiss. 

 u. prakt. Tierzucht, vol. v. pp. 42-93, under the title of " Wie 

 hat der Ur gesehen?" The special subject is the authenticity 

 and value of the various portraits and other representations 

 of the aurochs ; but attention is also directed to the supposed 

 evidence of the former existence in Germany of a short-horned 

 race of the species. In a second paper, Sitzber. Ges. naturf. 

 Freunde, Berlin, 1910, pp. 136-46, the same writer describes 

 new forms of extinct European and Siberian bisons. 



Fossil Cervid(M from Swabia form the subject of an article 

 by Dr. W. D. Dietrich, published in Mitt. Kgl. N aturalienkabinet, 

 Stuttgart, 1910, pp. 318-36 ; the specimens described being 

 referable to the red deer, elk, and reindeer. Cervics lydekkeri, 

 from the Pleistocene of Java, forms the subject of a paper by 

 Mr. K. Vogel von Falckenstein in the Sitzber. Ges. 7iaturf. 

 Freunde, Berlin, 1910, pp. 319-33. It is allied to C. axis and 

 also European Pleistocene forms. 



