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Show 38 MR. F. DAY ON RACES AND [Jan. 15, Shaw's woodcuts; but it appears from Tamil's work, «On the Growth of the Salmon in Fresh Water,' that the numbers are as follows: Shaw found at 1*0 inch in length 9 bands. 1-2 „ „ 13 or 14 bands 2*9 „ „ 16 bands „ „ z, y ,, Yarrell „ 3*5 „ „ 9 4*3 „ „ 11 „ 6*1 „ „ 10 „ „ 6*3 ,, „ j , But without descriptions it is not safe to go by figures respecting the modes of colouring. American Charr or Brook-Trout, Salmo fontinalis. About 8000 fry were turned into a large wooden box, which measured 20 X 18 feet. These fish were hatched in January 1883, and the water in which they have lived has remained at an average of about 44°. This species does well in a wooden tank indoors for a year, in which respect it differs from the other Salmonidae. But out of doors it seems to be rather delicate, and the older females, unless spawned as soon as ready, are very subject to fungus, and die egg-bound ; the males likewise are very often victims to this disease. November 29th, 1883, these young fish in the tank appeared to be very healthy ; four were removed for examination, and are now on the table. inches. Bars. Bars. No. 1. Length offish 3*5 10 10 No. 2. „ „ 3*5 8 9 No. 3. „ „ 3*5 7 No. 4. „ „ 2*1 7 7 Average.... 3*1 8 8 It would appear that, judging from these few examples, the smaller fish have the least number of bars ; but there are many intermediate half bars which only descend to the lateral line or a little below it. All of them had a few fine teeth on the head of the vomer, but none on the body of that bone. On November 15th, 1882, Sir James Maitland obtained 9000 ova from the American Charr, which were fertilized by the milt of a Charr obtained from Loch Rannoch, and which had been retained in one of the boxes. There was a little doubt expressed at the time respecting the milt, which was rather thick. The eggs were placed in box No. 116, and on November 29th, 1883, about 65 were alive, all being well-grown fish. The mortality among the 9000 ova was as follows :-November 28, December 309, January 1907, February 130, or a total loss of 2104. Probably this mortality may have been due to deficiency of fertilization. The young showed no amount of monstrosities or malformations, and have done well. On May 20th I received one, 1^ inch long, having 8 broad cross bands and many small intermediate ones ; no band on the dorsal fin. |