470 THE CANADIAN NATURALIST. 



" More complete or more valuable zoological researches than those 

 of Sars have rarely been contributed to the science of Natural 

 History, and the success with which he has prosecuted investiga- 

 tions, claiming not only a high systematic value, but also a deep 

 physiological import, is a wonderful evidence of the abundance of 

 intellectual resources which genius can develope, however its lot 

 be cast." * * =i< By the observations of Sat s on the develop- 

 ment of the Medusae he greatly advanced our knowledge of that 

 remarkable physiological phenomenon known as the alternation of 

 generations, which Chamisso had first indicated in the Salpae. 

 His last publication, " Memoire pour servir a la connaissance des 

 Crinoides vivants," caused especial interest, by showing that a 

 race of animals, supposed to be extinct for a period so long as 

 only to be measured by the duration of several past geological 

 epochs, occurred in a living state in the abysses of the Norwegian 

 seas; and this discovery mainly induced the recent exploration of 

 our own seas at great depths, which has produced such wonderful 

 results The published works of Sars are seventy-four, and they 

 are not less sound and valuable than numerous. 



It is exceedingly to be regretted that, iu spite of the most rigid 

 economy, the large family of Professor Sars is left in very 

 impoverished circumstances, six of the children being wholly 

 unprovided for." — Extracted from a notice hy Mr. J. G. 

 Jeffreys, F.R.S., in '^Nature." 



Editor's Note. — The Authors request that the following 

 alterations be made in their articles : — • 



For Dec, 1866, vol. iii, p. ]56, (reprint p. 20) line 4, for 3,.516 read 3,536. 



" 6, " 280 " 282. 

 " " " " " 5, for " which " read 



" .so that the total deaths." [This error is repeated iu the First 

 Annual Eeport of the Sanitarj' Association, page 3, column 2, 

 line 28, -where fur " children " read " persons."] 



For June. 1869, present vol. p J89, (reprint p 4) table 4, the supposed 

 population should be 106,375; and the deaths per 1000, 35.3; 

 altering the average of the latter to 35.2. P. P. C. 



For Sept., 1869, present volimie. 

 Page 140, line 11, fur " this region" read " continental Acadia," 



" 143, " 6, insert here pp. 147 (omitting the table), 148, 149 and 



150 as far as line 34. 

 " 152, " 21, for " second " read '• fifth," and three lines below, for 



" fcmrth" read " seventh." 

 " 1.54, " 21 and elsewhere, omit the references to Primula Mis- 



fassiiiica. 

 " 155, " 27, insert " III. Continental Type." 



