MISCELLANEA. 143 



east to west of the heavens, and burst with a loud report, the first 

 like the firing of several large guns, and ending exactly like 

 musketry file firing. Individuals on the frontier, who had not 

 seen the meteor, imagined that some of the outposts had been 

 attacked. 



1842. January 4th, 7-| p. m. A smart shock felt at Seebsagur ; 

 the weather gloomy, cold, and threatening rain ; cannot speak as 

 to direction ; shock similar in motion to those already noticed. 



October 29th, 8 p. m. A smart shock, direction apparently from 

 S. W. to N. E., trembling motion. 



1843. April 6th, 8 p. m. After a very hot and close sultry even- 

 ing, a severe shock of an eathquake at Dibrooghur lasted several 

 minutes. The motion, however, was only trembling, affecting those 

 houses which had posts built up by walls ; direction appeared to 

 be from W. or S.W. 



1843. April 7th, Midnight. Slight shock felt at Dibrooghur. 

 N. B. Both these earthquakes felt at Seebsagur, Jeypoor, and all 

 over Upper Assam. 



June loth, 11 a.m. Smart shock; motion vertical. 



17th, 8 p. m. A very smart shock ; at first slight, and followed 

 by a severer one ; motion undulating, and, from the position of a 

 clock which was stopped, must have come from S. W. or W. ; 

 lasted altogether about a minute. Weather rainy, with occasional 

 light squalls from S.W. These shocks felt at Dibroo, Jeypoor, 

 and Sakenah ; that of this date at a few minutes past eight reported 

 by the officer to have thrown down a portion of the bank of the 

 Burrumpooter. An earthquake on this day at Ceylon. 



September 3d, 2\ a. m. After as hot and sultry a day (the 2d) 

 as I ever felt, the clouds gathered to S. W., indicating rain, but 

 passed off without any ; night very close and sultry ; awoke by a 

 smart shock of an earthquake; cannot speak as to duration. 



7^ p.m. After a very hot day, clouds gathered at S. E., very 

 close and sultry ; squall came on a little before sun-set ; vivid 

 lightning all round the heavens previous to squall, making an ex- 

 traordinary noise in the heavens over head, like the falling of heavy 

 rain on distant jungle, or like the rushing of wind through a funnel ; 

 with this noise you heard an occasional growl like distant thunder. 



When the rain fell, this noise, which had continued for some 

 time, ceased ; thunder very high in the heavens, but the lightning 

 one blaze all round. While at dinner, smart shock from the S. 



III. Osseous Centres of the Vertebrae of Cartilaginous 



Fishes. 



It is not generally known, although alluded to by M. Agassiz in 

 the introduction to his great work on fossil fishes, that many if not 

 all cartilaginous fishes (sharks, rays, &c), have true bony nuclei 



