. Bulletin of the British Museum (Natural History), Geology. OF BRITISH ISLES 77. Fig. 6. Distribution of remains of Spermo- philus (Urocitellus) primigenius Kormos (V) and 5. (Colobotis) superciliosus (Kaup) (•) in the British Isles. In Britain it has usually been recorded as 5, erythrogenoides, a name first used by Falconer (in Murchison i868) for remains from caves of the Mendip Hills. Hinton (in Barrett-Hamilton & Hinton 1910-21 : 723) stated that recent study tended to show that this name must be treated as a synonym of S. superciliosus. I. M. Gromov of Leningrad studied the specimens
. Bulletin of the British Museum (Natural History), Geology. OF BRITISH ISLES 77. Fig. 6. Distribution of remains of Spermo- philus (Urocitellus) primigenius Kormos (V) and 5. (Colobotis) superciliosus (Kaup) (•) in the British Isles. In Britain it has usually been recorded as 5, erythrogenoides, a name first used by Falconer (in Murchison i868) for remains from caves of the Mendip Hills. Hinton (in Barrett-Hamilton & Hinton 1910-21 : 723) stated that recent study tended to show that this name must be treated as a synonym of S. superciliosus. I. M. Gromov of Leningrad studied the specimens from Ightham Fissures, Kent, and made the following remarks [in Hit., translation) : Two mandibular rami, no. M 11867, are typical remains of Citellus {Colobotis) superciliosus Kaup, broadly distributed in the northern part of continental Europe in Late Pleistocene ; during some part of this time it evidently also inhabited the British Isles. From the characteristic features of this species, as shown by the above-mentioned material, the following can be stated : width of P4 no more than 11 per cent greater than its length, processus articularis short and broad below the head, posterior incision of the mandible relatively small, foramen mentale situated far from the anterior border of the masseteric plates, etc. Family GLIRIDAE Thomas 1897 Genus MUSCARDINUS Kaup 1829 Hinton (in Barrett-Hamilton & Hinton 1910-21 : 351) recorded a single tooth of Muscardinus from the Forest Bed of Norfolk. This specimen has not been seen by the present writers. Muscardinus is nevertheless known from some Cromerian localities on the European continent so that its presence in Britain in Cromerian times is not improbable. Muscardinus avellanarius (Linnaeus 1758) Common or hazel dormouse Although remains of this species have been found at a number of cave sites - Dog Holes and Pin Hole Caves (79, 73) : Jackson (1934, 1947) ; Great Doward Cave (17) : British Museum (Natural History) - all these
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