62 



INSBCTIVORA 



are all longer in proportion to their height than in Sorex 

 araneus, and the posterior border is more concave. In size there 

 is a gradual and regular diminution from first unicuspid to third ; 

 fourth somewhat more abruptly smaller ; * fifth slightly smaller 

 than fourth when viewed from the side, but with larger crown 

 area due to the presence of a well developed postero-internal 

 crushing surface. This tooth is rela- 

 lp\ tively larger and more functional than 

 in Sorex araneus, showing no tendency 

 to become subordinate to paracone of 

 large premolar. Lower unicuspids 

 narrower and more trenchant than in 

 Sorex araneus. Except for this general 

 tendency the second shows no special 



"Pin 1^ 



peculiarities of form. The first, how- 

 Sorex alpinus. Anterior L . . ., . , ,.~, . e ,, 



teeth, x s. ever, is strikingly dinerent from the 



corresponding tooth in S. araneus. 



Its general outline when viewed from side is irregularly 



elliptical, with longest axis parallel to that of mandible, the 



upper edge with two low, rounded cusps, the anterior of which 



is about as large as lobes on cutting edge of incisor, the posterior 



smaller. Upper cheek-teeth not essentially different from those 



of Sorex araneus, except that hypocones are less developed. 



Lower cheek-teeth as in the related species. Pigmentation of 



teeth slightly less extensive than usual in Sorex araneus. 



Sorex alpinus alpinus Schinz. 



1837. Sorex alpinus Schinz, Neue Denkschr. Allgem. Sohweiz. Gesellsch. 



Naturwiss., Neuchatel, I, p. 13 (St. Gothard Pass, Switzerland). 

 1840. ? Sorex antinorii Bonaparte, Iconogr. Faun. Ital., I, fasc. 29 (No exact 



locality, and probably not a European species). 

 1857. Sorex alpinus Blasius, Saugethiere Deutschlands, p. 126. 

 1870. ? Sorex intermedins Cornalia, Catal. Descrit. Mamm. Ital., p. 27 (Hills 



of Brianza, Como, Italy). Part : body ; see Sordelli, Atti Soc. Ital. 



Sci. Nat. e del Mus. Civ. Stor. Nat., Milano, xxxvm, p. 364, 1899. 

 1899. ? Sorex alpinus var. longobarda Sordelli, Atti Soc. Ital. Sci. Nat. e del 



Mus. Civ. Stor. Nat., Milano, xxxvm, p. 363 (MS. synonym of 



intermedins). 

 1910. Sorex alpinus Trouessart, Faune Mamm. d'Europe, p. 50. 



Type locality. — St. Gothard Pass, Uri, Switzerland. 

 Geographical distribution. — From the Jura and Alps through 

 Tirol to Transylvania ; Pyrenees.f 



* In an adult female from Briinig, Switzerland (No. 85830, U.S.N.M.), 

 the third and fourth unicuspids on right side are fused into a single 

 2-cusped tooth, while those on left side are normal. 



t I have seen no Pyrenean specimens of Sorex alpinus. For record of 

 its occurrence see Trutat, Bull. Soc. Hist. Nat., Toulouse, xn, p. 100, 1878 

 ("massif de la Maladetta"). The animal is probably less common in the 

 Pyrenees than in the Alps, as I was unable to find it in several localities 

 resembling those where it regularly occurs in Switzerland. 



