GEN, SALMO. THE PARR. 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 w^ere 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 hyhrid, 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 



