43G Bibliographical Notices. 



species as had been described from time to time, to compare them 

 with each other, and to determine which were to be considered as 

 true species, and which as varieties. 



In the arrangement of the Soricidtr, which form the first division 

 of his work, M. De Selys-Longchamps has for the most part followed 

 Wagler, having only altered the value of the groups established by 

 that author. Thus he considers the entire family as divisible into 

 the two genera of Sorex and Crocidura. In the former he includes 

 Sorex and Crossopus of Wagler, here considered only as subgenera, 

 from their having many characters in common, in the ears, in the 

 colouring of the teeth, and in the fur and tail, and from the number 

 of the small lateral incisors not being esteemed a sufficient ground to 

 warrant a generic separation. The genus Crocidura comprises the 

 two subgenera of Pachyura and Crocidura, the former of which is 

 established here for the first time, for the reception of the Sorex 

 Etrusca of Savi, together with those foreign species having one more 

 lateral incisor above than the true Crocidura as restricted by our 

 author. It may be useful to those naturalists who are more familiar 

 with Duvernoy's arrangement of this family than Wagler's, to state 

 that the subgenus Sorex of this work answers to Amphisorex of Du- 

 vernoy's last memoir, Crossopus to Hydrosorex of the same author, 

 and Crocidura to Sorex ; the characters of which it is not necessary 

 to repeat here, as they have been already brought under the notice 

 of the English reader in a former number of this Magazine*. The 

 relative value, however, of these groups will be made more clear 

 when exhibited in the following manner ; and it may be desirable to 

 annex to each the included species. 



Gen. 1. SOREX, Lin. 



r - 1 - n 



Subgen. 1. Sorex, Wagl. Subgen. 2. Crossopus, Wag I. 



Sp. 1. tetragonurus, Herm. Sp. 4. fodiens, Pall. 



2. pygmceus, Laxm. .5. ciliatus, Sow. 



3. alpinus, Schinz. 



Gen. 2. CROCIDURA, Wagl. 



r - 1 - ■ n 



Subgen. 1. Pachyura, De Selys. Subgen. 2. Crocidura, Wagl. 



Sp. 1. Etrusca, Bonap. Sp. 2. Aranea, De Selys. 



(Sorex Etr. Savi.) (Sor. Aran. Auct.) 



3. Leucodon, Wagl. 



* Ann. of Nat. Hist. vol. i. pp. 422 and 424. 



