﻿Dec, 1895.] 



SOREX PERSONATUS. 



53 



point slightly in front of tlie middle of the first molar. The lachrymal 

 foramen is of the same size and shape as in the other small Shrews, and 

 is placed a little behind the middle of the first molar. 



Teeth. — Except for the different proportions of the unicuspids the 

 teeth of Sorex longirostris closely resemble those of S. personatus. The 

 excavations on the posterior borders of the upper molariform teeth, 

 however, are less extensive in 8. longirostris and are widest near the 

 middle of each tooth, while in ^S*. personatus the widest part is nearer 

 the internal border. The difference is most strongly marked in the 

 large second premolar. 



The unicuspid teeth (PI. IV, figs. 2, 3, and 4) resemble those of no 

 other Sorex found in the eastern United States. The second and third 

 incisors are large and snbequal, the latter being slightly the larger^ the 

 fourth very much snmller than the second or third, and also distinctly 

 smaller than the canine. The first premolar is minute and just visible 

 from the outer side. All the teeth are tipped with chestnut brown to 

 a slightly greater extent than usual in 8. personatus. 



The teeth vary somewhat in relative size, as shown by the figures^ 

 the fourth incisor occasionally nearly equaling the canine. In one 

 specimen the size and form of the fourth incisor differs appreciably in 

 the opposite sides of the jaw. 



Measurements, — Four adults from Raleigh, JST. 0. Average: Length, 

 87.75 mm.; tail vertebne, 33.25 mm.; hind foot, 10.75 mm. 



General remarlis, — Sorex longirostris resembles S. personatus in exter- 

 nal appearance, but differs from this species very widely in th'e remark- 

 ably broad, short rostral part of the skull. This difference is especially 

 noticeable when the palates of the two are compared. 



SOREX PERSONATUS Isidore Geoffroy Saint Hilaire. 

 (PI. IV, figs. 1, 5, 6, 7, and 8: PL VI, figs. 7 and 8.) 



1827. Sorex personatus I. Geoffrey Saint Hilaire, Mem. Mus. d'Hist. Nat., Paris, XV, 



p. 122. (United States.) 



1828. Sorex forsterl Ricliardson, Zool. Jonr., Ill, p. 516. (Fur countries to lat. 67^.) 

 1837. Sorex Qooperi Bachman, Jour. Acad. Nat. Sci. Phila., VII, Part II, p. 388, PI. 



XXIV, fig. 7. (North^yest Territory.) 

 1837. Sorex fimhripes Bachman, Jour. Acad. Nat. Sci. Phila., VII, Part II, p. 391, PI. 



XXIV, fig. 8. (Drurys Run, Pennsylvania.) 

 1842. Amphisorex leseueri Duvernoy, Magasin de Zoologie, Mamm., p. 33, PI. L. 



(Wabash River, Indiana.) 

 1842. Sorex platyrUnclms Linsley, Sill. Am. Jour. Sci., XLIII, p. 346. (Stratford, 



Conn.) 



1842. Otisorex pJatyrlditus De Kay, Zoology of New York, I, p. 22, PI. V, fig. 1. (Tap- 

 pan, Rockland County, N.Y.) 



1857. Sorex plaUirUnus Baird, Mamm. N. Am., p. 25. (Mass. and Vermont to Ohio.) 



1857. Sorex cooperi Baird, Mamm. N. Am., p. 27. (Labrador to Massachusetts, 

 Illinois, and Nebraska.) 



1857. Sorex Imydeni Baird, Mamm. N. Am., p. 29. (Fort Union [now Fort Buford], 

 N. Dak.) 



1857. "^J. Sorex personatus Baird, Mamm. N. Am., p. 30. (Washington, D. C.) 



