160 



THE GEOLOGIST. 



References to works on fossil mammals of this order will be found at p. 236, 

 vol. i, of Pictet's Traite de Paleontologie (Paris 1853 — 1857), where in plate 

 vi., are figures of the teeth of the upper jaw of the Arctomys alpinus, the alpine 

 marmot ; and of the Arctomys Arvemensis from the Pliocene beds of Auvergne. 



We learn from Pictet that remains of the Arctomys arvemensis, Brav., are 

 also figured by Gervais, in his Zoologie et Paleontologie Francais, pi. 26 and 

 pi. 48. 



The deposit in which Kaup found the Eppelsheim specimen was first regarded 

 as Miocene, and since referred to the diluvium by H. von Meyer. It was a 

 nearly complete specimen, surpassing the marmot in size. It is the Arctomys 

 primigoiia of Kaup, and Myoxus primigenius of H. von Meyer (Palaeologica p. 61 

 and p. 409). 



M. Gervais, in his Zool. et Pal. Francais, p. 20, p. 46, figs. 11 and 12, refers 

 to this species the bones found in the diluvium of Paris, NiOrt, and Issiore. 



Arctomys spelaus, of Pischer von Waldheim (Nouveaux Memoires de l'Acade- 

 mie de Moscow, 1834. t. hi, p. 381), has been found in the caverns of Prussia. 

 It is allied in form to A. bobac, but its skull shows too many differences for the 

 union of the species. M. Pomel in the Bulletin de la. Societe Geologique de 

 Prance 2e serie, t. i, p. 594), indicates a marmot from the Auvergne alluvium 

 differing from the A. primigenia. 



The marmot of the alps {A. marmotta, Schreber) has been found a fossil in 

 the diluvium of Mossbach and Koestrich. (Herm. v. Meyer, Neues Jahrb, 

 1847, p. 181). 



The Plesiarctomys Gervaisii, Brav. et Pomel (Notice stir les Ossemens Fossiles 

 de la Debruge : Gervais, Zool. et Pal. Fr., p. 47J, surpasses, slightly, in size 

 the marmot, and has been found fossil in the lacustrine limestone of Saint 

 Perreal, near Apt (Parisien superieure). 



The spermoplnls differ from the marmots in their pouches, and their lighter 

 forms. They are found in the tertiary and diluvium beds. The Spermophilus 

 speciosus of H. v. Meyer (Leonh. und Bronn, Neues Jahrb, 1846, p. 474) is only 

 known by an upper jaw found at Weisenau, in miocene strata. 



The S. super ciliosus, Kaup (Oss. Poss. de Darmstadt, 5 liv., pi. 25, figs. 

 3 — 6), is found near Eppelsheim, with Arctomys primigenia. It is probably the 

 same species as that from the bone - breccias of Montmorency, Auvers, 

 and Auvergne. M. Desnoyers says that it is most nearly allied to 8. Richard- 

 sonii of America (Bull. Soc. Geol. Fr., t. xiii. ; Pomel, id., 2e serie, t. hi., p. 

 212. Gervais : Zool. et Pal. Fr., p. 19). 



Pictet places in this group the genus Lithomys, which H. v. Meyer established, 

 Ncucs Jahrb., 1846, p. 475, for the miocene rodents of Weisenau, and which 

 II. von Meyer in Bronn's "Enumerator" placed with the squirrels (Sciurina). 



The marmots (Arctomys, Gmel.) have the lower incisors pointed like the 

 squirrels, but less compressed, the molars "herissees de pointes les formes 

 lourdes/ 3 (Pictet) and the tail short. They have only been found in diluvium 

 and upper tertiaries. The Pleisiarctomys (Gervais) have the molars like those 

 of the marmots, except that the tubercles are much more rounded, indicating 

 a more frugivorous diet. 



EititATA in " Geol. of Cleveland."— At p. 82, line 16, for " analogies" read 

 " analysis"— S3, line 1, for "portion" read "position" — p. 83, line 31, for 

 " from the oprth part" read "for the most part" — p. SS, line 4, for clay-stones" 

 read ''clay-ironstones'' — p. 90, line 30, for "east" read "coast" — p. 93, line 32, 

 for "clay read "stag" — p. 93, line 39, for "often" read "just." 



Errata in " Geol. Excursion to the Channel Islands. — At p. 112, line 

 13 from the bottom, for "great" crystals read "quartz" crystals — p. 114, foot- 

 QOte, for " Mr. .lilies" read " Mr. Ln/rcs"—]). 115, quotation from Virgil, for 

 Dtudiis" read ''mediis" 



