126 



SORICID^— NEOMYS 



The generative organs, of both sexes, are usually described 

 as opening within the same ring as the anus, but Adams 

 informs me that this condition is by no means invariable. The 

 vagina is apparently perforate at all ages (Adams). The penis 

 is broad and provided with lateral processes. The muzzle is 

 broader and blunter, especially at the tip, than in Sorex. 



The stomach is globular and without pyloric elongation 

 (Jenyns, Ami. and Mag. Nat. Hist., June 1841, 267). 



There are ten mammae, arranged in five pairs along almost 

 the whole ventral surface. 



The skull is larger and the teeth are altogether more 

 powerful than in 5'. araneus. The interpterygoid groove is 



Fig. 26. — Skull of Neomys fodiens — (a) from above ; (//) from the side ; 

 (c) from beneath. (Drawn by G. Dollman.) 



broad and the massive naso - frontal region is evidently in 

 correspondence with the well-developed snout. The peculiar 

 articulation of the mandible has been described above on 

 page ']'^. 



The dental formula is — 



3-3 

 2-2 



o 



T 



pm 



m 



30, 



there being one unicuspid less on each side of the upper jaw than 

 in Sorex (Fig. 24, No. 3, p. 90). The middle upper incisors 

 are large and prominent, but, whereas in Sorex the second cusp 

 reaches a length not much, if at all, inferior to that of the first, 

 in Neomys the two are quite uneven, the second, although 

 sharp, being so short that it alters the whole appearance of the 

 tooth, depriving it of its forked outline. These teeth are less 

 divaricated at their point of origin than in Sorex; although not 



