30 On Non-Linear Coresolvents. 



English Mail I transmitted what I believe will be found to be the 

 most general mode of determining whether a proposed differential 

 equation admits of finite solution, that is to say, of solution by 

 means of indefinite integrals. My process applies successfully 

 to the results obtained by Boole in the Philosophical Transactions 

 for 1864. 



" Oakwal," near Brisbane, Queensland, Australia, 

 Tuesday, April 23rd, 1867. 



Aet. II. — The Vertebrata of Tasmania, recent and fossil by 

 Gerard Krefft, F.L.S., G.M.Z.S., &c, Sfc, Curator and Secre- 

 tary of the Australian Museum. 



[Read before the Society, 4th September, 1867.] 



With much interest I have perused Mr. S. H. Wintle's paper : 

 "A visit to the bone caves of Grlenorchy" published in the first 

 number of the " Colonial Monthly Magazine" at Melbourne and 

 Sydney, in September 1867, and with greater interest, I have care- 

 fully examined the mammalian remains collected there on which I 

 now report to the Council of the Royal Society of New South 

 Wales as follows : — 



All the bones submitted to me for inspection belonged to two 

 species of Marsupial animals still living in abundance on the 

 island — one the large Wallaby or Brush Kangaroo (Halmaturus 

 bennettii) — the other the Sooty Opossum or Phalanger (Phalan- 

 gittafuliginosa) and I have numbered these fragments from 1 to 

 45, in order that they may easily be identified. 



Halmatueus Bennettii. 



1. Portion of skull, left side, with the ear-bone and part of 



Zygoma. 



2. Eight ramus, lower jaw, with molar-like premolar and four 



molars, the last just cutting through. 



3. Bight ramus, lower jaw of another individual, with teeth in 



the same condition. 



4. Another lower jaw as the one before. 



5. Another, somewhat more fractured. 



