The Baculum In Microtine Rodents Part 7

The similarities or differences in the baculum in Old World and New World representatives placed in the same genus or subgenus, or thought to be "companion species" have been commented upon in accounts of _Lemmus_, _Dicrostonyx_, _Clethrionomys_, _Lagurus_, _Arvicola_, _Stenocranius_, _Chilotus_, _Chionomys_, _Pitymys_, and in accounts of _Microtus agrestis_ as compared with _M. pennsylvanicus_, and _Microtus oeconomus_ (both Old World and New World).

The baculum in the Microtinae more closely resembles the baculum in the Cricetinae of the Old World than in the Murinae, or than in any other rodents known to me. This resemblance suggests relations.h.i.+p between Microtinae and Cricetinae.

LITERATURE CITED

ARGYROPULO, A. I.

1933a. Die Gattungen und Arten der Hamster (_Cricetinae_ Murray, 1866) der Palaarktik. Zeitschr. f. Saugetierkunde, 8:129-149, 27 figs. in text.

1933b. uber zwei neue palaarktische Wuhlmause. Zeitschr. f.

Saugetierkunde, 8:180-183, 3 figs. in text.

CALLERY, R.

1951. Development of the os genitale in the golden hamster, _Mesocricetus (Cricetus) auratus_. Jour. Mamm., 32:204-207, 1 fig. in text.

CHAMBERLAIN, J. L.

1954. The Block Island meadow mouse, _Microtus provectus_. Jour. Mamm., 35:587-589, 2 tables in text.

DEARDEN, L. C.

1958. The baculum in _Lagurus_ and related microtines. Jour. Mamm., 39:541-553, 1 fig. in text.

DIDIER, R.

1943. L'os penien des Campagnols de France du Genre _Arvicola_.

Mammalia, 7:74-79, 10 figs. in text.

1954. Etude systematique de l'os penien des Mammiferes (suite), Rongeurs: Murides. Mammalia, 18:237-256, 14 figs. in text.

ELLERMAN, J. R.

1941. The families and genera of living rodents. Vol. II. Family Muridae. The British Museum (Natural History), London, pp. xii + 690, 50 figs.

FRILEY, CHARLES E.

1947. Preparation and preservation of the baculum of mammals. Jour.

Mamm., 28:395-397, 1 fig. in text.

HALL, E. R., and E. L. c.o.c.kRUM.

1953. A synopsis of the North American microtine rodents. Univ. Kansas Publ., Mus. Nat. Hist., 5:373-498, 149 figs. in text.

HAMILTON, W. J., JR.

1946. A study of the baculum in some North American Microtinae. Jour.

Mamm., 27:378-387, 3 figs. in text.

HIBBARD, C. W., and G. C. RINKER.

1942. A new bog-lemming (Synaptomys) from Meade County, Kansas. Univ.

Kansas Sci. Bull., 28:25-35, 3 figs. in text.

1943. A new meadow mouse (_Microtus ochrogaster taylori_) from Meade County, Kansas. Univ. Kansas Sci. Bull., 29:255-268, 5 figs. in text.

HINTON, M. A. C.

1926. Monograph of the voles and lemmings (Microtinae), living and extinct, Vol. I. British Museum (Natural History), London, pp. xvi + 488, plus 15 plates, 110 figs. in text.

MATTHEY, R.

1953. Les Chromosomes des Muridae. Revue Suisse de Zoologie, 60:225-283, avec les planches 1 a 4 groupant 84 photomicrographies, 98 figures et 5 schemas dans le texte.

1955. Nouveaux doc.u.ments sur les chromosomes des Muridae. Problemes de cytologie comparee et de taxonomie chez les Microtinae. Revue Suisse de Zoologie, 62:163-206, avec 114 figures.

MILLER, G. S.

1896. Genera and subgenera of voles and lemmings. North American Fauna No. 12, pp. 1-85, 40 figs. and 3 plates in text.

OGNEV, S. I.

1948. The mammals of Russia (USSR) and adjacent countries (The mammals of Eastern Europe and Northern Asia), Vol. 6. Publ. Acad. Sci. USSR, pp. 1-587, 260 figs., 12 maps, and 11 color plates in text (in Russian).

1950. The mammals of Russia (USSR) and adjacent countries (The mammals of Eastern Europe and Northern Asia), Vol. 7. Publ. Acad. Sci. USSR, pp. 1-736, 347 figs., 15 maps, and 10 color plates in text (in Russian).

RUTH, E. B.

1934. The os priapi: A study in bone development. Anat. Rec., 60:231-249, 16 figs. in 3 plates.

SMITH, D. A., and J. B. FOSTER.

1957. Notes on the small mammals of Churchill, Manitoba. Jour. Mamm., 38:98-115, 3 figs. and 3 tables in text.

WHEELER, B.

1956. Comparison of the Block Island "species" of _Microtus_ with _M.

pennsylvanicus_. Evolution, 10:176-186, 4 figs. and 2 tables in text.

WHITE, J. A.

1951. A practical method for mounting the bacula of small mammals.

Jour. Mamm., 32:125.

ZIMMERMAN, K.