4 Mamm . 
II. MAMMALIA. 
be the case with Homalodontotherium , in which, however, the terminal 
phalanges are said to be like those of Chalicotherium , of which the genus 
is regarded as an ancestor. Among the P voter other iidcc, Theosodon is 
declared to be monodactyle ; while Hibodon , originally described as a 
Tapiroid, is referred to the Sirenia. Notes on the Marsupials and Rodents 
of the Santa Cruz beds are likewise given ; and a remarkable humerus 
is stated to possess characters connecting the Monotremes with the lower 
Yertebrates. Certain new generic and specific names are proposed, but 
as these are neither defined nor refer to particular specimens which can 
be identified in Museums, they have no status, and accordingly are not 
quoted here. 
[Amegiiino, F.] Sobre la Presencia de Yertebrados do Aspecto 
Mesoz6ico en la Formacion Santacruc6na do la Patagonia Austral. 
Rev. Jard. Zool. B. Ayres, i, pp. 76-84. 
In the course of this paper the author describes two humeri from the 
Santa Cruz beds of Patagonia, which he regards as indicating as many 
genera of Monotremata [#. v. p. 42]. 
Anonymous. The Nearctic Region and its Mammals. Nat. Sci. iii, 
pp. 288-292. 
A critical paper, dealing with the views recently propounded by Hart 
Merriam & J. A. Allen. 
Bailey, Y. The Prairie Ground-Squirrels, or Spermophiles of the 
Mississippi Yalley. Bull. Dep. Agric. Ornith., No. 4, 70 pp., 3 pis., 
4 maps. 
Ball, V. Lion-Tiger and Tiger-Lion Hybrids. Nature, xlvii, pp. 390- 
392, 607, & 608. 
Ballet, — . Note sur les Caracteres qui distinguent les Races dans les 
Animaux Domestiques. Mem. Ac. Sci. Toulouse (2) iv (1892), 
pp. 102-121. 
Beauregard, H. Note sur une Balceonoptera sibbaldii 6chou6e £t 
Ouessant. C.R. Soc. Biol. (2) v, p. 274. 
This specimen — a male — measuring 30 metres in length, was stranded 
on February 23rd. 
. Note sur deux Lois qui fait ressortir PEtude Morphologique du 
Syst&me Dentaire des Carnivores. T. c. pp. 784 & 785. 
The author states (1) “ C’est tou jours a la m&choire inf&ieure que se 
manifeste le plus nettement le caractere propre a la dentition d’un genre 
determine.” And (2) “Chez tous les carnivores A regime purement 
carnassier, il existe sur la voftte palatine, de chaque c6te, entre la carnas- 
siere et la molaire suivante une fosse profonde qui re^it le tubercle 
principal de la carnasstere inf^rieure. Cette fosse disparait chez les 
espfcces k regime plus ou moins completement frugivore.” 
