Mr Shaw's Experiments on the Fry of the Salmon. 171 



of INIarch (54 days after impregnation) the embryo fish was 

 visible to the naked eye. On the 7th of May (101 days after 

 impregnation) the little fish had burst the shell, and were to be 

 found amongst the shingle of the stream. The temperature of 

 the water was at the time 4S°, and of the atmosphere 45°. 

 Fig. 1* is an accurate representation of Fig. l. 



the young fish ten days old, taken from 

 the pond on the 1 6th of May. A con- 

 siderable portion of the ovum is still 

 attached to the abdomen. Fig. 2. is -^^S- ^' 



a specimen, forty-eight days old, taken 

 from the pond on the 24th of June. 

 Its symmetry is yet imperfectly deve- pj-^ 3^ 



loped. Fig. 3. represents the fish of 

 two months' old, taken from the pond 

 on the 7th of July. Its shape is now 



materially improved, and it presents in miniature the propor- 

 tions of a mature fish. Fig. 4. is a specimen at the age of four 

 • Fig. 4. 



months, taken from the pond on the 7th of September. The 

 characteristic marks of the parr are now distinctly visible. The 

 fish has attained a fine symmetry, and the features of the pa- 

 rents may almost be discovered in their child. Fig. 5. is a 



Fiff. 5. 



• In reference to these illustrations, it may be stated, that the drawings 

 having been made from the specimens after tiiey had been for a considerable 

 time preserved in spirits, they do not possess all the plumpness and elegance 

 of contour which distinguish the fish in their natural state. For all gene- 

 ral purposes, liowcvor, I believe they will be found suflicienlly exact. 



