2 Mamm. 
MAMMALIA. 
France, and E. T. Newton in England, have respectively published 
faunistic works treating of the extinct Mammals of certain horizons in 
the two countries. In spite of the serious drawbacks alluded to above, 
a great advance in our knowledge of the Tertiary fauna of South 
America has accrued from the publications of Amegiiino, Burmeister, 
Mercerat, and Moreno ; the most important discoveries being the 
occurrence of Marsupials of Australian types, and of Cebidce , in the lower 
Tertiaries of Argentina and Patagonia. In North America, attention 
may be especially directed to W. B. Scott’s monograph of the genus 
Poebr other ium , and the relation of the Tylopoda to other Ungulates ; 
and also to his memoir on Mesohippus and Leptomeryx. 
I.— THE GENERAL SUBJECT. 
Allen, J. A. Recent Work in North American Mammalogy. Tr. N. 
York Ac. Sci. x, pp. 71-85. 
After giving a survey of the older literature on the subject, the author 
refers to the advantage of Trinomialism, and then proceeds to show how 
first of all the number of American species was reduced by regarding 
a large number of forms as varieties, while it has been subsequently 
largely increased by the acquisition of a number of what are said to be 
entirely new types. 
. Notes on a Collection of Mammals from Costa Rica. Bull. Am. 
Mus. Nat. Hist, iii, pp. 205-218. 
The species noticed are 88 in number. The new forms are 1 Blarina , 
and 3 llesperomys. [See Soricidce and Afar idea.] 
. On a Collection of Mammals from Southorn Texas and North- 
Eastern Mexico. T. c, pp. 219-228. 
31 species are mentioned. These include a new variety of Scalops and 
a new Dipodops. [See Talpidca and Geomyidce.] 
■ . Notes on New or Little known North-American Mammals. T.c. 
pp. 263-310. 
A long paper, based on specimens in the Museum of Natural History. 
The genera referred to are Heteromys , Dipodomys , Dipodops (n. sp.), 
Peroynathus (n. sp.), Neotoma (n. var.), Sigmodon. Oryzomys (n. sp.), 
Hesperomys , Vesperimits (n. sp.), Sciurus , Lepus , Spilogale , and Fells. 
The author follows Thomas in disregarding the name llesperomys, but 
disputes its identity with Cricetus , and adopts instead Vesperimus , 
Onychomys , and Oryzomys , as distinct genera. On p. 294 the author states 
that the name Ilesperomys leucopus is antedated by Kerr’s name ameri- 
canus. [No allusion is made to the discussion of this question by E. 
Coues, Am. Nat. 1879, p. 784. — R. L.] See Muridce and Geomyidce. 
. [See also p. 32, Octodontidee.] 
