SPECIAL WORK. 
Mamm. 29 
* f Sipalocyon pusillus , n. sp., Amegiiino, Rev. Arg. Hist. Nat. i, p. 315, 
Low. Tertiary, Patagonia. 
4 f Ictioborus fenestratus, n. g. & sp., Ameghino, l. c., ibid. 
f Hathliacynus fischeri , p. 52, \cultridens , f rollieri, \lynchi , f 
p. 53, n spp., Low. Tertiary, Patagonia, Mercerat, Rev. Mus. la 
Plata, j. 
-fAgustylus caxnifex , fprimcevus, n. spp., Mercerat, t. c., p. 54, ibid. 
< \ Thylacodictis exilis , n. g. & sp., Mercerat, Z. c., sfaTZ. Identified by 
Amegiiino, Rev. Arg. Hist. Nat. i, p. 354, with Sipalocyon gracilis. 
f Acrocyon equianus } fpatagonensis, n. spp., Rev. Mus. la Plata, ii, 
p. 55, ibid. 
O f Theriodictis platensis , n. g. & sp., Mercerat, 1 . c., ibid. Identified by 
Ameghino, Rev. Arg. Hist. Nat. i, p. 354, with Macrocyon. 
' 5 . RODENTIA. 
Duval, M. Le Placenta des Ronguors. J. de I’Anat. Phys. xxvii, 
pp. 24-73 & 314-395, pis. i-iv & xv-xviii. 
The continuation of the memoir quoted in Zool. Rec. xxvii, Mamm. 
p. 32. 
Fleischmann, A. Bemerkungen fiber den Magen der Rodentia. 
Morph. JB. xvii, pp. 408-416. 
Supplemental observations referring to the paper by Toepfer, quoted 
below. 
Pousargles, E. Glandes annexes do l’Appareil Gdnital Mdle de la 
Gerboise Mauri tanie. Bull. Soc. Philom. (8) iii, pp. 128-132. 
Toepfer, K. Die Morphologie des Magens der Rodentia. Morph. JB. 
xvii, pp. 380-407, pi. xxiv. 
A comparison of the structure of the stomach in a number of genera 
of Rodents. 
a. Sciuridac. 
Mearns, E. A. Description of a New Subspecies of the Eastern Chip- 
munk, from the Upper Mississippi Region, West of the Great Lakes. 
Bull. Am. Mus. Nat. Hist, iii, pp. 229-233. 
Tamias striatys, n. var. griseus. Mearns, t. c. p. 231. 
. Sciurus auriculatus , n. sp., Matschie, Arch. f. Nat. 1891, p. 355, 
Cameroons. 
^ f Ilaplostropha scalabriniana , n. g. & sp., Amegiiino, Rev. Arg. Hist. 
Nat. i, Tertiary, Parana. 
* Arctomys bobac , Sciiaff, Arch. f. Nat. 1891, pp. 239-244, contrasts its: 
skeleton with that of A. marmotta. 
' Nehring, SB. nat. Fr. 1891, pp. 175-177, has notes on remains of 
Spcrmophilus from Bourg, in the Gironde. 
Sptrmophilus sonoriensis , n. sp., Ward, Am. Nat. xxv, pp. 158-160, 
Mexico. 
