22 Mamm. 
MAMMALIA. 
Arvicola campestris^ Bias., = A. agrestis, auctt. ; Winge, Vid. Medd. 
1875, p. 237. 
Arvicola fulvus, Desm., = A, savii, De Sel., = A. subterranens, De Sel. ; 
L. H. Jeitteles, Verb. z.-b. Wien,*xxv. (1875) pp. 555-562. 
Myodes lemmus. W. D. Crotch remarks on its migrations, which he 
states to be directed due westward, and suggests that they may be 
caused by an instinct inherited from ancestors which were in the habit 
of visiting the “Miocene Atlantis,” now sunk beneath the ocean. 
P. L. S. xiii. pp. 27-34, 83. 
Geomyid^. 
Geomyinoi. E. Coues compares very minutely the cranial and dental 
characters of Geomys and Thomomys, which he regards as forming a 
family, Geomyidce, allied to but distinct from the Saccomyidoe [= Hetero- 
myince, Alst.]. Bull. U. S. Ceol. Surv. i. (1875) pp. 83-90. He^also fully 
describes the species and discusses their distribution ; Powell’s Report 
on Colorado River (Washington : 1875), pp. 217-279. ' 
Thomomys clusius, sp. n., E. Coues, tom. cit. p. 263,' pi. i. Rocky 
Mountains. 
Geomys tuza. Notes on its habits ; G. B. Goode, tom. cit. *pp. 281-285. 
DlPODIUiE. 
Meriones, F. Cuv.'(wec Illiger), renamed Zapus^ is made the type of 
Zapodidce, fam. n., = Jaculidce, Gill. The only species, Z. hudsonius 
(Zimm.), is fully described, with notes on its distribution and history. 
E. Coues, Bull. U. S. Geol. Surv. i. (1875) pp. 253-262.' 
4 Dipus loftusi figured ; W. T. Blanford, East. Persia, ii. pi. vii. 
OCTODONTID.®. 
Ctenodactylus gundi. On its anatomy and position ; it is considered 
to be closely allied to Pedetes^ Petromys^ and Pectinator, P. Gervais, J. 
Zool. V. pp. 223-232, pis. vii. & viii. 
Loncheres caniceps, sp. n., A. Gunther, P. Z. S. 1876, p. 745, pi. Ixxiii. 
Columbia. 
. Echimys dimidiatus (p. 747), E. hrevicauda (jp. 743), and E. ferru- 
gineus (p. 750, pi. Ixxiv.), spp. nn., A. Gunther, tom. cit. Tropical S. 
America. 
HySTRICIDA!]. 
-i Aiherura. A. Gunther gives cranial characters of A. macrura and A. 
africana. Tom. cit. pp. 742 & 743. 
Trichys^ g. n., allied to Atherura, but with the tail rudimentary ; 
I skull without enlarged air-sinuses and with distinct post-orbital pro- 
cesses. Type, T. lipura^ sp. n., A. Gunther, 1. c. p. 739^ pi. Ixxi. 
Borneo. 
Ilystrix crassispinis, sp. n., A. Gunther, tom. cit. p. 736, pi. Ixx. 
\ Borneo. 
