574 Analytical Notices of Booh a. 



to be two on each side of the hinge in both valves. This is certainly 

 correct with respect to one valve, but the other possesses only 

 a single tooth on each side of the hinge, as justly pointed out by 

 Mr. Sowerby. 



Monographics de Mammalogie, oa descriptions de quel- 

 ques genres de Mammiferes dont les especes ont etc 

 observees dans les differens Musees de V Europe. Par 

 J. C. Temminck. Livraisons 1 - 3. pp. 72. pi. viii. 



M. Temminck, whose labours in Ornithology are so justly 

 esteemed by die students of that extensive department of Zoology 

 for their extreme accuracy and precision, has just entered on the 

 elucidation of another class of the vertebrated animals, in which he 

 will have ample opportunities for the display of those talents 

 evinced by his former publications. In his various visits to the 

 different collections of Europe, which were chiefly devoted to the 

 investigation of the subjects connected with his favourite study, 

 the observations of this industrious naturalist were, however, by no 

 means confined to this limited range, but also embraced in its widest 

 extent the history of the Mammalia. The numerous errors and 

 almost interminable confusion existing in the previous nomen- 

 clatures of this, the highest range of animal productions, appear to 

 have made a strong impression on his mind, and to disperse and 

 correct them, he determined on the publication of a series of 

 Monographs on the Mammalia, the first fruits of which we have 

 now to announce. 



The genera comprehended in the three livraisons which have 

 hitherto appeared, are Phalangista, Didelphis, and Dasyurus. On 

 each of these, particularly on the latter, the observations of M. 

 Temminck are most important and satisfactory. Correcting the 

 character of Phalangista, from which he excludes the flying 

 species, by the substitution of six incisors of the upper jaw in lieu 

 of eight, as stated by Geofl'roy and Illiger, he divides the species 

 into two sections, the first of which has the tail almost entirely 

 covered with hair and the ears long, and the second has these 



