GEN. THYMALLtTS. THE GRAYLING. 149 



in England — the lower part almost a bright orange, 

 and the back fin approaching the colour of the da- 

 mask rose, or rather of our anemone. The Grayling 

 spawns in April, and sometimes as late as the be- 

 ginning of May; the female is generally then 

 followed by two or three males. She deposits her 

 ova in the tails of sharp streams, and the males 

 rubbing against her, shed upon the ova the milt or 

 seminal fluid. I do not know how long a time is 

 required for the exclusion of the young ones ; but 

 in the end of July, or beginning of August, they 

 are of the size of Sprats, four or five inches long, 

 and already sport merrily at a fly. The Grayling 

 hatched, I conclude, in May or June, become the 

 same year, in September or November, nine or ten 

 inches long, and weigh from half a pound to tern, 

 ounces ; and the year after they are from twelve to 

 fifteen inches long, and weigh from three-quarters 

 to a pound ; and these two sizes are the fish that 

 most usually rise at the fly." (Page 182.) 



According to the same authority. Grayling require 

 water of a moderate temperature. They are never 

 found in streams that run from glaciers, and they 

 are easily killed by cold or heat. In the hot sum- 

 mer of 1825, great numbers died in the Avon, 

 killed by the heat in July. They do not dwell, like 

 Trout, in rapid shallow torrents ; nor, like the Charr 

 or Chub, in deep pools or lakes ; but require a 

 combination of stream and pool, the latter for rest- 

 ing in. Their food consists of the various kinds of 

 river flies ; and Mr. Yarrell has found small shells, 



