1871.] MR. ST. GEORGE MIVART ON HEMICENTETES. 77 



lumbar vertebrae ; caudal vertebrae numerous ; ultimate phalanges 

 of manus not bifurcating. 

 Hab. North America. 



Scapanus *, Pornel. 



!• 3=3"' C. y— x , P.M. g^, 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 J, Cuvier. 



*■ 2=2' C. q-q, P.M. 3 =j, M. ==. 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 region 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 II, Cuvier. 



1- 2=2' C- j^j, P.M. ~, M. == . Cranium with a very marked 

 interorbital constriction ; palate prolonged beyond the last molar, 



* Pomel, Bulletin de la Soc. Geologique de France, 1849, vi. ; S. F. Baird, 

 ' Mammals of N. Western America,' p. 58, pi. 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. 



t De Blainville, ' Insectivores,' pis. v. & ix. ; F. Cuvier, ' Dents des Mamrni- 

 feres,' xxii.; Owen, 'Odontography,' pi. 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, pi. xxx. ; Bachman, 

 Boston Journal N. H. 1843, ii. p. 28 ; Le Conte, Proc. of Acad, of Philadelphia, 

 vi. p. 326. 



§ Possibly there may also be only four upper incisors in Scalops and Scapanus. 



]| J. F. Brandt, Archiv fur Natur. 2 Jahrg. 1836, i. p. 176; Geoff. Mem. 

 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 Surml' 

 ii. p. 95, v. p. 567. ™ ' 



