The Llamas congregate together in considerable herds on the sides of the Andes, and generally in the colder and more elevated regions. When the Spaniards first arrived in Peru they were the only beasts of burden employed by the natives; and even at the present day, when horses have become so excessively common, they are usually preferred for passing the mountains, on which their sureness of footing, exceeding even that of the mule, gives them a manifest superiority. Generally speaking they are quiet, docile and timid; but they occasionally exhibit much spitefulness, especially if teased or ill treated. Their mode of evincing this is very peculiar, and consists in darting their saliva through their nostrils with considerable force. Like all the other Ruminants they subsist entirely on vegetables. Those in the Tower Menagerie have a particular fondness for carrots; and if one of these is abstracted from them while they are eating, their anger is immediately roused, and they spit, as it is termed, with the greatest vehemence, covering with their saliva a surface of three or four yards in extent. One of the animals in the cut is represented in the act. [Illustration] [Illustration] THE MALAYAN RUSA-DEER. _CERVUS EQUINUS._ CUV. The Deer constitute a numerous and beautiful group of Ruminants, which are readily distinguished by the graceful symmetry of their form, by their long and slender, but firm and sinewy, legs, by their broad and pointed ears, and by the comparative shortness of their tails; but more especially by the generally large and branching horns which ornament the heads of the males. Like all the ruminating animals, with the exception of those mentioned in the preceding article, they are furnished with eight cutting-teeth in the lower jaw, opposed to a callous and toothless surface in the upper; and with expanded, flat, and deeply bifurcated hoofs, constituting two distinct and apparent toes, above which they have also the rudiments of two others. Some of the species have canine teeth in the upper jaw, generally in the males alone; and they have all six molars on each side. In the greater number of them the nostrils are surrounded by a naked muzzle; and most of them are also provided with a sinus or sac, of greater or less extent, immediately beneath the inner angle of the eye, called the sub-orbital sinus, the _larmier_ of the French zoologists.