I\lr. G. E. Dobson on a neui Species o/" Sorex. 155 



depression or mouth opening near their base. But what 

 distinguishes this Protozoon from the Flagellata in general is 

 the possession of numerous filiform, rigid, straight pseudo- 

 podia covered with granulations, in fact similar to those of 

 the Acanthocystid.es , and by means of which the animal 

 attaches itself to the ground and moves slowly. This 

 organism is furnished with a central nucleus and a contractile 

 vesicle, and can feed equally by the whole of its surface, after 

 the fashion of the Heliozoa. Although this Protistan must 

 be regarded as a Flagellate, it seemed to me to be of interest 

 to mention it here, as it appears to have acquired certain 

 elements characteristic of a very different group of Protozoa. 



XIX. — Description of a new Species o^ Sorex from Saghalien 

 Island. By G. E. Dobson, M.A., F.R.S. 



The following description of the largest species of the genus 

 Sorex as yet known to inhabit the Eastern Hemisphere is 

 derived from an examination of four specimens, two adult 

 females preserved in alcohol and two skins with skulls, which 

 form part of the collection of the Zoological Museum of the 

 Imperial Academy of Sciences at St. Petersburg. 



Sorex unguiculatus. 



Larger than Sorex alpinus, but with a considerably shorter 

 tail, and distinguished from every known species of the genus 

 by the extraordinarily large size of the manus and its claws, 

 which have their parallel only in Grocidura macroi~>us. In 

 the shape of the head, body, and tail this species resembles 

 S. vidgaris ; the tail is clothed evenly with short, rather stiff 

 hairs, which do not form a pencil at the extremity ; the fur 

 is dark brown above, on the under surface the extremities of 

 the hairs are ashy ; the dorsal surface of the manus is clothed 

 with a few short, shining, grey hairs, but the digits are 

 naked and the rings of integument are divided into tubercles, 

 not entire as in S. vulgaris. 



The manus and pes are very large, especially the former, 

 which greatly exceeds that of S. vulgaris both in breadth and 

 in length, the claws of the three middle digits being nearly as 

 long as the digits without claws ; on the other hand those of 

 the digits of the pes are not unusually large. 



The skull differs altogether from that of S. vulgaris in its 



