2G6 SALMONID^ OF BRITAIN. 



Struan hybrids breeding with Lochleven trout, PLate XI, fig. 3.* 



Day, Froc. Zool. Soc. 1885, p. 243. 



November 12th, 1884. — Four thousand five hundred eggs from two Lochleven 

 trout were milted from a male struan hybrid and placed in box 88 ; 1292 eggs were 

 picked out during incubation, 1568 were unimpregnated, and the remainder hatched 

 on February 2nd, 1885, or in 83 days ; among them were many deformities, a few 

 dropsies, and subsequently a high mortality. On June 30th, 320 were placed in 

 pond 3. Some were albinos, one especially was not blind at all, there Avas a black 

 line along the top of the dorsal fin, the largest fish was four inches long. July 

 5th, 1886, doing well. November, 1886, their colours were very similar to those 

 of the " zebra " breed, only being a little more plum-coloured along the sides, the 

 dorsal fin less marked, and the head darker ; consequently, those hybrids which 

 contain one-fourth of Lochleven trout blood and three-quarters of that of British 

 and American chars commingled, have adopted the colouring pi-eviously observed 

 in hybrids between the American char and the Lochleven trout, while the tints of 

 the British char are almost absent. These forms are not sterile. March, 1887, 

 there were 157 of these fish alive, the longest being 11 inches. July 7th, 1887, 

 they were looking exceedingly well. 



Struan hybrids breeding with Lochleven trout. 



December 5th, 1885. — Seven thousand eggs of Lochleven trout were milted from 

 struan hybrids, and on February 20th, or in 77 days, about 1500 hatched. July 30th, 

 1886, shifted 620 fish to no. 5, or 20-feet pond. Many were albinos. The mor- 

 tality was as follows : December 63, January 311, February 1531, unimpregnated 

 3782. March 17th, 1887, they now numbered 500 and were moved to pond no. 4, 

 and on June 14th to pond no. 13, there being 413 good and strong fish. 



Struan hybrids breeding with British char. 



December 5th, 1886. — About 1200 eggs from struan hybrids were milted from 

 a char received from Windermere, but the fish was nearly spent, and only two 

 hatched, on February 20th, or in 77 days, the impregnation being possibly bad 

 owing to deficiency of milt. The following eggs were picked out : December 322, 

 January 1335, February 223. 



Zebraf hybrids breeding with Lochleven trout. 



Day, Proc. Zool. Soc. 1885, p. 242. 



November 12th, 1884, pond no. 3, at Howietoun, was examined, and the 

 females of the " zebra " race were not quite ready for breeding, while they 

 appeared to be fewer in number than the males, some of which were ripe : 1350 



* B xi, D 13, P. 16, V. 9, A. 11, C. 21, L. 1. 133, L. tr. -2 7, Case. pyl. 45. 



Inches. 



Length of example 7'5 



,, ,, head 14 



,, „ pectoral fin I'l 



,, ,, caudal fin 1"15 



,, ,, ventral fin 08 



Height of body 18 



Eye, diameter of 0'3 



Eyes from end of snout 04 



Eyes apart 045 



Distance from snout to dorsal fin .... 3o 



,, ,, base of pectoral to base of ventral . 2'0 



,, ,, ,, ,, ventral to anal . . . . 1'4 



This example was captured October 13th, 1886, and is the one figured. 



t Zebras are a breed of hybrids in which the American char is the male and the Lochleven 

 trout the female parent (sec pages 260-262). 



