SUPPLEMENTARY NOTES. 
p. 41 . PiioPESSOR Keusten has found distinctly formed crystals 
of prismatic Felspar on the walls of a furnace in which Copper 
slate and Copper Ores had been melted. Among these pyro- 
chemically formed crystals, some were simple, others twin. 
They are composed of Silica, Alumina, and Potash. This dis- 
covery is very important, in a geological point ot view, from its 
bearing on the theory of the igneous origin of crystalline rocks, 
in which Felspar is usually so large an ingredient. Hitherto 
every attempt to make felspar crystals by artificial means has 
tailed. See Poggendorfs Annalen, No. 22, 1834, and Jameson’s 
Edin. New Phil. Journal. 
P. 88. An account has recently been received from India of 
the discovery of an unknown and very curious fossil ruminating 
animal, nearly as large as an Elephant, which supplies a new 
and important link in the Order of Mammalia, between the 
Ruminantia and Pachydermata. A detailed description of this 
animal has been published by Dr. Falconer and Captain Cautley, 
who have given it the name of Sivatherium, from the Sivalic or 
Sub-Himalayan range of hills in which it was found, between 
the Jumna and the Ganges. In size it exceeded the largest 
Rhinoceros. The head has been discovered nearly entire. The 
front of the skull is remarkably wide, and retains the bony cores 
of two short thick and straight horns, similar in position to those 
of the four horned Antelope of Hindostan. The nasal bones are 
salient in a degree without example among Ruminants, and ex- 
ceeding in this respect those of the Rhinoceros, Tapir, and 
Palseotherium, the only herbivorous animals that have this sort 
of structure Hence there is no doubt that the Sivatherium was 
invested with a trunk like the Tapir. Its jaw is twice as large as 
that of a Buffalo, and larger than that of a Rhinoceros. The 
