22 Mamin . 
II. MAMMALIA. 
Whitaker, J. A Descriptive List of the Deer-Parks and Paddocks of 
England. London : 1892, 8vo, xviii & 204 pp., illustrated. [Omitted 
from Zool. Rec. xxix.] 
Wilson, J. T., & MArtin, C. J. Observations upon the Anatomy of the 
Muzzle of the Ornithorhynchus. Macleay Memorial Volume (Linn. 
Soc. N. South Wales), pp. 179-189, pis. xxii & xxiii. 
* . On the Peculiar Rod-like Tactile Organs in the Integument and 
Mucous Membrane of the Muzzle of Ornithorhynchus. T. c. pp. 190- 
200, pis. xxiv-xxvi. 
Winge, H. Jordfundno og nulevende Pungdyr ( Marsupialia ) fra 
Lagoa Santa, Minas Geraes, Brasilien. Med udsigt over Puugdyrenes 
Sloegtskab. E. Mus. Lund, ii, art. 2, pp. 1-149, pis. i-iv. 
Woodward, M. F. Contributions to the Study of Mammalian Dentition. 
Part i. On the Development of the Macropodidce. P. Zool. Soc. 
London, 1893, pp. 450-473, pis. xxxv-xxxyii. 
The presence of 5 or even 6 vestigial incisors in the Macropodidce is 
indicated ; while the tooth generally regarded as the successor to the 
fourth milk-molar is declared to have no connection with the latter, and 
is regarded as a retarded premolar, which may be the fourth of the 
series, the tooth which it appears to succeed being the fifth of the 
series. The opinion that the molars belong to the second dentition is 
not supported. 
Wortman, J. L. A New Theory of the Mechanical Evolution of the 
Metapodial Keels of Diplarthra. Amer. Natural, xxvii, pp. 421-434. 
From the fact that the keel on the distal end of the metapodials is 
frequently not congonitully correlated with the groove on the proximal 
surfaco of the first phalangoal, it is urgod that the production of the 
whole structure is due to mechanical impact, and is not owing to favour- 
able variations preserved by natural selection. 
. On the Divisions of the White River or Lower Miocene of Dakota. 
Bull. Amer. Mus. v, pp. 95-106. 
The formation in question is divided into the Titanotherium , Oreodon , 
and Protoceras beds, the Mammalian fauna of each of which is indicated. 
It is incidentally mentioned that an Acevatherium from the Oreodon beds 
had a more or less persistent upper canine. 
. [See also Osborn & Wortman.] 
& Earle, C. Ancestors of the Tapir from the Lower Miocene of 
Dakota. T. c. pp. 159-180. 
It is shown that Protapirus (distinguished from Tapirus by its 
simpler premolars) occurs in the White River Miocene ; while the 
earliest type of the family is considered to be the Eocene Systemodon. 
f The phylogeny of the allied genus Colodon is also discussed ; its ances- 
tral type being Ilelaletes. [See p. 35, TapiridceS\ 
