184 Dr. Matox's and Mr. Rackett's 



An excellent Monograph ia of the Helix decollata was published 



by 



BRISSON, 



whose observations are illustrated by thirteen figures, and they 

 relate to the structure of the animal as well as to the shape of the 

 shell. 



DR. FORBES 



gives, in the Philosophical Transactions, an account (which, how- 

 ever, is much too concise) of a Patella found at Bermuda. The 

 figure, as it exhibits only the structure of the animal, makes but 

 imperfect amends for the deficiency of description; and though a 

 short addition is made to the latter by Dr. Morton, the species 

 is far from being defined. 



In 1760, 



KNORR, 



a painter of Nuremberg, began the publication of a work enti- 

 tled " Les Dclices des Yeux et de I'Esprit." He did not live to 

 complete it himself; but the task was carried on by his execu- 

 tors, who concluded it with a sixth part, published in 1773. This 

 last part contains forty plates of shells; each of the five former 

 was limited to thirty. There are, in the whole, 978 figures, very 

 slightly engraved, but well drawn and most elegantly painted. 

 No order is observed; and many subjects are repeated, on ac- 

 count of slisht variations in the colour and contour. The last ten 

 plates present white shells on a dark-coloured ground. With the 

 second part a systematical table is given ; but this is connected 

 only with the plates preceding, and very nearly agrees with that 

 adopted by Rumphius, of which, in the present improved state 

 of science, the reader will be content to take only a transient 

 notice. The descriptions of the plates relate chiefly to the figure 

 and colour of the objects represented, containing but few remarks 



concerning 



