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Show 1871.] MR. ST. GEORGE MIVART ON HEMICENTETES. 77 lumbar vertebrae ; caudal vertebrae numerous; ultimate phalanges of manus not bifurcating. Hab. North America. SCAPANUS *, Pornel. I. 3_r-r> C. j==j, P.M. j-j, M. g==. No fissure bordering the epiotic ; cranium with a very slight interorbital constriction ; palate not extending back beyond the last molars; first upper incisor much larger than the second or third one; the two upper posterior incisors, the upper canine, and first two premolars all of nearly the same size ; lower incisors, canines, and premolars very gradually increasing in size from before backwards. Hab. North America. SCALOPS;};, Cuvier. I- ____> C 0_Eo> P.M. 3==, M. 3^3. Cranium with a very marked interorbital constriction; no fissure bordering the epiotic ; palate extending back beyond the last molars ; first incisor very large, second and third minute ; upper canine long and conical, and much more vertically extended than the first upper premolar ; second lower incisor much larger than the first. Hab. North America. MYOGALINA. A distinct pterygoid fossa; pterygoid regioii not inflated ; no open fissure bordering opiotic; coronoid process very lofty; never as many as three incisors above §; first upper incisor longest tooth of upper jaw ; manubrium not very large; clavicle and humerus elongated ; a metacromion process ; no sickle-shaped carpal bone. MYOGALE ||, Cuvier. I |z| c. £3, P.M. J=J, M. |=J. Cranium with a very marked interorbital constriction ; palate prolonged beyond the last molar, * Pornel, Bulletin de la Soc. Geologique de France, 1849, vi.; S. F. Baird, ' Mammals of N. Western America,' p. 58, pl. xxx.; Le Conte, Proc. of Acad. of Philadelphia, vi. p. 326; Bachman, Journ. Acad. Nat. Sci. Phil. viii. 1839, p. 58; Wagner, Schreb. Supplem. v. p. 574. t Prof. Peters considers that there are but four upper incisors. J De Blainville, ' Insectivores,' pis. v. & ix.; F. Cuvier,' Dents des Mammiferes,' xxii.; Owen, ' Odontography,' pl. ex. fig. 2; Giebel, Zeitschr. f. d. ges. Naturwiss. Halle, Bd. xii. 1858, pp. 395-405; Wagner, Schreb. Supplem. ii. p 102, v. pp. 571, 807; Baird,' Mammals of America,' p. 58, pl. xxx.; Bachman, Boston Journal N. H. 1843, ii. p. 28; Le Conte, Proc. of Acad, of Philadelphia, vi. p. 326. . . . S Possibly there may also be only four upper incisors in bcalops and Scapanus. | J. F. Brandt, Archiv fur Katur. 2 Jahrg. 1836, i. p. 176; Geoff. M e m . du Mus. i. tab. xv. figs. 10-12, 1815; De Blainville, 'Insectivores,' pis. ii., v., and ix.; F. Cuvier, ' Dents des Mammiferes,' no. xxi.; Wagner, Schreb. Suppl. ii. p. 95, v. p. 567. |