. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 414 Mv. O. Thomas on nexn Tasmanian Muridai. fourth. Sole-pads five on the fore feet and six on t]ie hmd. Mamma3 only four, there being no pectoral and only two inguinal pairs ; these latter both quite close to the vulva. Ca?cum large, about 3 inches in length. Skull and incisor teeth of ordinary murine proportions; but the molars most remarkably broad and heavy, the anterior ones each more than half as broad again as the palatal space between them. Their pattern also, as show
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 414 Mv. O. Thomas on nexn Tasmanian Muridai. fourth. Sole-pads five on the fore feet and six on t]ie hmd. Mamma3 only four, there being no pectoral and only two inguinal pairs ; these latter both quite close to the vulva. Ca?cum large, about 3 inches in length. Skull and incisor teeth of ordinary murine proportions; but the molars most remarkably broad and heavy, the anterior ones each more than half as broad again as the palatal space between them. Their pattern also, as shown in the woodcut (fig. 2), is somewhat different from that of true Mus^ as there are three cusps to the middle lamina of the first and the ante- rior lamina of the second tooth only.^ These third cusps,. "which are external, are very small, while the internal ones are unusually large. Third molars remarkably large, as long as either of the preceding teeth. Front edge of the anterior zygoma-root (woodcut, fig. 3) markedly concave. Anterior palatine foramina very narrow, extending backwards to be- tween the middle of the first molars. Supraorbital edges ?without marked ridges. For dimensions see below. The type and only specimen of this interesting form is an adult female in alcohol, presented to the Museum in 1852 by Mr. Ronald Gunn. It is worthy of note that externally this rat is almost exactly similar to the next species, an animal also from Tasmania, so that an examination of the skull is needed to distinguish the two forms. The second species is a member of the restricted genus Ifws, and I propose to call it, on account of the velvety nature of its fur,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original London, Taylor and Francis, Ltd
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