. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. 92G RODENTIA and its genei'al form differs notably in the ciineate outline due to the narrowness of anterior zygomatic region, the almost uniformly convex dorsal profile, and the slight deflection of basi- cranial axis, so that upper third or fourth of foramen magnum is above level of alveolar line. Dorsal profile convex from front of nasals to lambdoid ridge, sometimes with a slight flattening in interorbital region and a faint posterior concavity ; ventral profile simil
. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. 92G RODENTIA and its genei'al form differs notably in the ciineate outline due to the narrowness of anterior zygomatic region, the almost uniformly convex dorsal profile, and the slight deflection of basi- cranial axis, so that upper third or fourth of foramen magnum is above level of alveolar line. Dorsal profile convex from front of nasals to lambdoid ridge, sometimes with a slight flattening in interorbital region and a faint posterior concavity ; ventral profile similar, though less strongly convex ; posterior truncation of brain-case nearly vertical, but occipital condyles projecting. Fig. 188. Citellus citellus. Nat. size. sufficiently to be just visible from above. Brain-case very broadly ovate when viewed from above, its greatest Avidth equal to length, its posterior width obviously exceeding than that at postorbital constriction; surface less rounded than in Sciurus vulgaris, and lyrate figure formed by parietal ridges much narrower; lambdoid crest essentially as in S. vid(jaris, but constriction just in front of occipital region less evident. Occiput low, its general form as in Sciurus vulgaris, but contrast between its height and that of middle of brain-case not especially marked ; protuberances on posterior surface of occiput less noticeable than. 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 British Museum (Natural History). Dept. of Zoology; Miller, Gerrit S. (Gerrit Smith), 1869-1956. London, Printed by order of the Trustees
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmammals, bookyear1912
