GEN. SALMO. THE PARK. 127 



periments remains to be stated. Having observed 

 that male Parrs, with the milt matured and flowing- 

 in profusion from their bodies, were at all times in 

 company with the adult female Salmon, while de- 

 positing her spawn, he conceived that they might 

 seek each others company for a sexual purpose; 

 and upon impregnating the spawn of a female Sal- 

 mon weighing fourteen pounds, with the milt of a 

 male Parr weighing one ounce and a half, the pro- 

 cess succeeded in every respect, the young appear- 

 ing in the usual time, and continuing in the utmost 

 health and vigour, with all the ordinary characters, 

 up to the time of assuming the migratory dress. 

 Many experiments of a similar kind were made, 

 invariably with the same result, so as to leave not 

 the smallest doubt of the fact, that a male Parr can 

 effectually impregnate the ova of a full-grown Sal- 

 mon. It was also proved that the offspring of a 

 Parr and Salmon can, in like manner, propagate their 

 kind ; and it is thus thought to be demonstrated, ac- 

 cording to a recognised law in the economy of na- 

 ture, that such offspring could not be hybrid^ but 

 the natural produce of two sexes of the same 

 species. 



All Mr. Shaw's experiments have been repeated 

 and confirmed by Mr. John Young, Sutherlandshire ; 

 who has moreover carried his observations so far as 

 to trace the Parr into the full-grown Salmon. 



(Sp. 125.) S. eriox. Bull Trout or Grey Trout. 

 This is the largest of the British Salmonidae next to 

 the true Salmon, often measuring between two and 



