Contribution toward a revision of the Little Striped Skinks (genus Spilogale), with descriptions of seven new species -- Descriptions of five new Ground Squirrels of the genus Tamias -- Descriptions of a new Evotomys from Colorado -- Descriptions of two new species of Evotomys from the Pacific coast region -- Descriptions of a new Marten (Mustela caurina) from the northwest coast -- Description of a new species of Molossus from California -- Description of a new Prairie Dog from Wyoming -- Descriptions of three new Ground Squirrels of the Spermophilus spilosoma group -- Descriptions of three new Kangaroo Rats, with remarks on the identity of Dipodomys ordii of Woodhouse -- Descriptions of a new Pocket gopher, of the genus Geomys, from western Nebraska -- Description of a new species of Hesperomys from souther Florida