214 



Ex. 2. 



2,27089702247 

 2,7 2 1 9 

 7,2 327 

 2,3 3 3 

 3,3 4 3 2 

 3,4 1 2 2 

 4,1 024 

 1,0507 



474=6-79 



Remark. The principle which I have thus developed is touched 

 upon in some manuals of arithmetic, when we are shown that the 

 same remainder in the expressions 



1000\ /1000 



leads to the identity 



7'1M3=1001. 



In the rules given in this Paper, I have shown the high analytical 

 value of the principle ; but the properties of numbers, to which we 

 are led when we apply the same (principle) in a synthetical way, 

 are not less remarkable. As an instance I may state that the 

 symbol 



37 .. . . . leads to a curious relation among the members 

 7, 11, and 37. 



V. " On the Structure of the Chorda Dorsalis of the Plagio- 

 stomes and some other Fishes, and on the relation of its 

 proper Sheath to the development of the Vertebrae." By 

 Professor ALBERT KOLLIKER, of Wiirzburg. Communi- 

 cated by Dr. SHARPEY, See. R.S. Received December^, 

 1859. 



I take the liberty to present to the Royal Society the results of an 

 extended series of investigations into the development of the vertebrae 

 of the plagiostomous and some other fishes. 



