Miscellanies. 217 



produced by losing four volumes of hydrogen and gaining two vol- 

 umes of oxygen, conformably to the theory of types and the law of 

 substitutions. — Ibid. 



22. Iodine in Coal. — M. Bussy has recently procured iodine in the 

 form of hydriodate of ammonia, in different specimens of coal from 

 Commentry, (Allier. ) — Ibid. 



23. Six new species of Kangaroo. — Mr. Gould, who has just re- 

 turned from Australia, after an absence of two years and a half spent 

 in the investigation of the habits and economy of the animals of that 

 continent, brought before the notice of the Zoological Society six 

 new species of kangaroo, which he had discovered principally in the 

 interior of that country. The first to which he drew attention was a 

 large species, but inferior in size to the Macropus major, discovered 

 on the summits of the mountain ranges. Mr. Gould observed that 

 it was a most powerful animal, and very dangerous to approach. The 

 general color of the male is slate gray, slightly intermixed with brown 

 on the back, and the feet are black ; the female is much paler than 

 the male : the fur is somewhat harsh and shaggy. The unusual 

 strength and size of the limbs suggested the specific name robustus, 

 which Mr. Gould gave to this animal. The second species of kan- 

 garoo has a remarkably elegant appearance ; being of a slender, deli- 

 cate form, and adorned with two white stripes, which, commencing at 

 the occiput, run down the back of the neck on to the shoulders, where 

 they are recurved ; the general color of the upper part is gray ; of the 

 neck, pale fawn color ; and of the under parts, white. Mr. Gould 

 proposed to designate this species by the name frenatns. The third 

 species is about the same size as the last, being about two feet in 

 height, and of a yellowish fawn color, becoming whitish about the 

 head ; its tail is very long ; but the most remarkable character of this 

 animal consists in its having a nail at the tip of the tail ; this nail is 

 hidden by the tuft of hair with which the end of the tail is furnished, 

 and greatly resembles a finger nail, both in texture and form, but is of 

 a black color. The name -unguifer was proposed for this species. 

 In the M.frenatus Mr. Gould had found a horny nail at the tip of the 

 tail, but less developed than the last mentioned species. To the fourth 

 species Mr. Gould gave the name lunatus ; this name being suggested 

 by two crescent-shaped white marks observable on the shoulders of 

 the animal, which is about the size of a rabbit, of a gray color, and has 

 a short head and large ears. The fifth species, Mr. Gould observed, 

 is nearly allied to the Macropus penecillatus, but difiers, it being ra- 

 ther smaller, in having the tail less bushy, the under parts of the body 



Vol. XL, No. 1.— Oct.-Dec. 1840. 28 



