BibliograpMcal Notices. 69 



some doubt, and it is stated that S. titan in the structure of its 

 lower premolars is intermediate between the mandible referred to 

 S. giganteus and the fossil European pigs. Another species is named 

 8us Falconeri, and although the name is new it is adapted to some 

 well-known materials. Its cranium approximates to that of the 

 living S. barhatus of Borneo, though the living species has the palate 

 more produced behind the third molar tooth ; and this fossil is well 

 distinguished from most of the other fossil species by the structure 

 of its molars, which are of complex character. In this structure it 

 makes an approximation to Phacochcerus, especially in its last 

 lower molars, which might be converted into those of Phacochoerus 

 if the main columns were isolated and reduced to the size of the 

 accessory columns. In another direction the teeth of this species 

 approximate to the still more complex molars of ffippohyus. Sus 

 hysudrkus is a fourth species, figured by Falconer, known from 

 ample materials, which indicate that it is distinct from living pigs in 

 ha\ang larger and stouter premolars, which somewhat approximate 

 to those of the African river-hogs, and in having the molars of the 

 male wider with lower crowns. The last upper molars have a 

 conspicuously developed cingulum. A fifth species is Sus punja- 

 hiensis, known from a mandible. It was a diminutive pig, no larger 

 than the existing pigmy hog of Nepaul, of which it is supposed to 

 be the ancestor. It was about as large as a hare. 



Hippohyus sivalensis is described from the cranium and mandible, 

 which make some approximation to Hyotherium, though the struc- 

 ture of the molars is much simpler. The true molars somewhat 

 resemble those of Hipjjopotcnnus, but have the longitudinal and trans- 

 verse valleys equally developed. The molars may also be compared 

 with those of Hemimeryx or Hyopotamus. 



Sanitherium ScJiIagintweiti of Von Meyer is identified with the 

 Sus pusillus of Falconer. This genus has a well-marked cingulum 

 which distinguishes it from Hippohyus, and in several respects it 

 makes an approximation to Sus. 



HyotJierium is another genus of Von Meyer's hitherto somewhat 

 loosely identified, which the author recognizes in India. The species 

 H. scindiensis is known from a few molar teeth. In Hyotherium 

 European specimens show that the canines and lower incisors are 

 but little specialized. 



Tetraconodon magnus is a Siwalik tj^pe only known from molars 

 and mandible. 



Listriodon, which occurs in the Middle Miocene of Europe, is 

 represented by two species in the Siwaliks. It was referred to the 

 genus Tapirus by Falconer, and classed with the Bunodont Suina by 

 Lartet. The species L. pentapotamice is closely allied to the Euro- 

 pean form ; but the second species, L. Theobaldi, is smaller and 

 distinguished by having the transverse valley wider and more open, 

 and by wanting oblique ridges running from the anterior and 

 posterior cingula to the summits of the main ridges. The memoir 

 concludes with a list of writings upon the fossils described. 



In the thiid part are descriptions of a few rodents from the 



