60 



Royal Astronomical Society. 



ferior groups, or natural families, composing the order of Marsupials, 

 adopting the modification of the locomotive organs, in the ordinary 

 Marsupials, as the basis of classification. By this means he arranges 

 the Marsupials into five families, as shown, with the genera which 

 respectively compose them, in the following table : 



r 1. Didelphis 



Marsupials 



I. Scansores . . ^ 



L 



II. Saltores. 



III. Fossores 



IV. Cursores 



V. Monotremes 



2. Cheironectes 



3. Phalangista 



4. Petaurus 



5. Phascolarctos 



6. Hypsiprymnus 



7. Alopecurus 

 Halmaturus 

 Phascolomys 

 Perameles 

 Dasj'urus 

 Thylacinus 

 Ornithorynchus 

 Echidna 



This portion of Mr. Ogilby's paper concludes with some remarks 

 on the analogies of the Marsupials, with the other primary groups 

 of Mammals. 



KOYAL ASTRONOMICAL SOCIETY. 

 Nov. 11. — This was the firstmeeting after the long vacation; and 

 the following communications were read : viz. 



I. Observed occultations and eclipses of Jupiter's satellites, by 

 Mr. Maclear, of Biggleswade, from May 1830 to the present month. 



II. Three observed occultations, in the months of May and June 

 in the present year ; and five observed eclipses of Jupiter's satel- 

 lites, in the months of August, October, and November. By Mr, 

 Snow. — These observations were made at Saville Row, London. In 

 the eclipses recorded on the 3rd of November, the 4th satellite 

 emerged quite close to the 1st, which made the latter appear as if it 

 had suddenlj' become double. It was an interesting phaenomenon. 



III. Observations of the occultation of Aldebaran, on the 23rd 

 October. By Mr. Holehouse. 



" The telescope was a seven-feet achromatic, by Tulley, with a 

 power of 162, adjusted to the star. The atmosphere was free from 

 clouds, and clear. I saw the moon steadily approach the star, until 

 the star appeared to cling, half hidden by the moon, for about 'it or 

 5 seconds, by estimation, when it suddenly disappeared, leaving in 

 my mind little doubt that the appearance was caused by the refrac- 

 tion of the moon's atmosphere." 



IV. Observation of the right ascensions and polar distances of 

 the planets Uranus, Jupiter, Vesta, and Mars, from September to 

 December, 1830. By M. Bianchi. In a Letter to Professor Airy. 



M. Bianchi made his observations with a meridian circle of 3 

 feet, having a S-feet telescope magnifying about 100. The appa- 

 rent 



