ME. F. DAY ON BEITISH SALMO^'ES. 397 



it was kiudly sent to me by Mr. Carriugton, F.L.S., the natu- 

 ralist in charge. Here no question respecting the parentage of 

 the fish could arise, no crossing with European trout could have 

 occurred ; but a single glance at the specimen sufficed to show 

 great differences from what may be considered to be its normal 

 form. The head had much elongated in proportion to the length 

 of its body ; and the very form of the subopercle had changed, 

 being twice as long as deep, instead of nearly square, as observed 

 in this vspecies when in a state of nature. I had also two other 

 examples of this fisli reared from eggs derived from the same 

 source ; they were turned out in Cardiganshire in 1876, and cap- 

 tured in the middle of 1877 : in them the head was not elongated, 

 and the form of the subopercle was normal. It appeared to me 

 that these facts were very suggestive : certain unnatural condi- 

 tions had caused unnatural changes of certain parts ; and it did 

 not appear improbable that, were other examples similarly 

 reared, they might in like manner differ from the primitive stock. 

 Neither could I see why, if such forms were transferred to ponds 

 or streams, they should not retain such abnormal variations 

 through succeeding generations or return to what normally 

 existed among their ancestors. 



I also showed four examples of young salmon (Salmo salar) 

 reared by Mr. Frank Buckland from eggs received from Huningen, 

 and which were collected from salmon captured for this purpose 

 from below the falls of Schaffhausen. As year after year passed 

 by, and these fish were still retained in the comparatively small 

 amount of fresh Avater which was sufficient to fill the tanks in the 

 Horticultural Gardens, the same results developed themselves 

 which have usually attended the retaining of salmon parr iu 

 freshwater ponds. The lanky half-starved body became identical 

 with that of Salmo gracilis, Couch, and /S'. argenteus'*-, Giinther. 

 As this subject has been well treated of by Dr. Murief, I do not 

 propose considering it further at this time. 



Since the period (1880) first alluded to, I have received 

 extensive collections of Salmonidae, more especially from Sir Pryse 

 Pryse, of Grogerden, Cardiganshire, a beautiful variety+ obtained 

 for me in Yorkshire by Mr. Gr. Brooks, F.L.S., Loch-Leven trout 

 from our late Secretary, Mr. E. R. Alston, examples from Water- 

 ford and elsewhere ; while I have visited the Eastern counties, the 

 museums of the North and Scotland, personally captured examples 



* Drawing exhibited. + Figure exMbited. 



t Proc. Zool. Soc. 1868, p. 247, pi xxiii, and 1870, p. 30, pi. ii. 



