MAMMALIA. 
27 
only, traces of tlie suture were observed in one of the two ex- 
amples examined ; it is between the first and second. Dental 
formula + | + . 
Finally, Brachysorex, the dentition of whicli could not be 
treated by the author in his memoir, has been lately examined 
by him in the Paris Museum. In none of the specimens 
could a sutura maxillo-intermaxillaris be observed. In B. me- 
phitis and B. hrevicaudatus y which have five small lateral teeth, 
the second lower (canine) tooth corresponds to the space between 
the third and fourth upper small lateral teeth, as in Sorex ; 
consequently the fourth upper small lateral tooth is to be 
regarded as the upper canine, and the fifth as a premolar. In 
B. palustris and B, JlavescenSy which have four small lateral 
teeth, the lower canine corresponds to the space between the 
second and third upper small lateral teeth ; consequently the 
third is the upper canine, and the fourth a premolar, as in 
Crossopus fodiens. 
As it has been indicated above, the author recognizes three 
types of dentition in Sorex, viz. 1, the type with white teeth, 
the points being brownish-red [S: vulgaris) ; 2, the type with 
white teeth {Croc, aranea) ; 3, the type with white teeth, the 
points being of a more or less light brownish-red colour [Cross, 
fodiens). Finally he collects the facts mentioned and others 
of minor importance, by which these three types are charac- 
terized, in a synoptical table. The treatise is accompanied by 
six plates illustrating the dentition ; to facilitate a complete un- 
derstanding, we may add a few of the explanations of the plates : — 
Plate I. fig. 9. Skull of young S, vulgaris. 
10. Foramina incisiva. 
12. A. Molars from above. B. Side view. 
Plate II. fig. 12. A. Upper incisor with liook-like process. 
14. Views of the variations of the foramina incisiva in difter- 
ent examples of Cross, fodiens. 
Potamogale. Prof. Allman^s memoir has been published in 
Trans. Zool. Soc. vi. 1866, pp. 1-16. He gives a detailed 
description of the external and osteological characters, and of a 
part of the anatomy of the soft parts. He comes to the same 
conclusions as Dr. Bocage as regards the systematic position of 
this animal (see Zool. Becord, ii. p. 32), giving a somewhat 
different formula of the dentition, viz. i. — g, c. — , p. 
^ = 36'^. The memoir is accompanied by a scries of 
accurate woodcuts and two excellent plates, representing the 
entire animal and the skeleton. 
Potamogale. Dr. Gray censures the Pecorder for the remarks made in 
* On reexamining tlie specimen, the author found that the dentition was 
not perfectly developed, the last molar being still hidden in the alveola. 
