All these races are simple mongrels, and come from the mixture of two pure races; but there are other dogs which may be called double mongrels, because they proceed from a pure race and one already mixed. The bastard pug is a double mongrel, and comes from a mixture of the pug with the small Dane. The Alicant dog is also a double mongrel; he proceeds from the pug and the small spaniel. The Maltese, or lap-dog, is a double mongrel, and comes from the small spaniel and little water-dog. In fine, there are dogs which may be called triple mongrels, because they proceed from the mixture of two races which have already been mixed; as the Artois dogs and what is called the _street dogs_, which resemble all dogs in general, but no one in particular, since they proceed from races which have several times been mixed. SUPPLEMENT. The following curious fact I had from M. de Mailly, of the Academy of Dijon: "The curate of Norges, near Dijon, has a bitch, which has had all the symptoms of pregnancy, and having puppies without having been in either state. She was proud, but was not suffered to go with a dog, yet at the end of her usual term her paps were filled with milk, and she brought up some young puppies that were taken to her, with as much care and tenderness as if they had really been her own; and what is more singular, this same bitch, about three years since, suckled two young kittens, one of which has imbibed so much of the nature of her nurse, that her cries infinitely more resemble the tones of a dog than those of a cat." This is certainly a rare phenomenon, and were this production of milk without impregnation more frequent, it would render female animals more analogous to female birds who produce eggs without connection with the male. The Russians have brought several dogs to Paris, as Siberians, a very different race from those which we have described; one in particular, both male and female, were about the size of a common greyhound, with pointed noses, ears half erect, and long tails; they were entirely black, excepting a spot of white which the female had upon the top of the head, and one which the male had upon his tail; they were very fond, but exceedingly dirty and voracious, and it was almost impossible to satisfy them with food; upon the whole, they were evidently of the same race as we have treated of under the denomination of Iceland dogs. Mr. Collinson, who had made various researches concerning the Siberian dogs, informed me that their noses were pointed, and their ears long, that some of them carried their tails like the wolf, others in the same manner as the fox, and that they certainly engendered with both those animals; that he had himself seen dogs and wolves couple in England, and although he knew of no one who could say the same with regard to dogs and foxes, from the kind well known there by the name of the fox-dogs, he did not think there could be any doubt of the fact.