38 MR. F. DAY ON RACES AND [Jan, 15, 



Shaw's woodcuts ; but it appears from Yarrell's work, 'On the G-rowth 

 of the Salmon in Fresh Water,' that the numbers are as follows : — 



Shaw found at TO inch in length 9 bands. 



» >j 



1-2 „ „ 13 or 14 bands 

 2'9 ,, ,, 16 bands 



Yarrell „ 3-5 „ „ 9 



4-3 ., „ 11 



6-1 „ „ 10 



„ 6-3 ,, „ 11 





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 Salmonidse. 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 ; tlie 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. 



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, 1 16, and on November 29th, 1883, about 65 were ahve, all being 

 well-grown fish. The mortality among the 9000 ova was as 

 follows :— November 28, December 309, January 1 907, 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 

 bauds and many small intermediate ones ; no band on the dorsal fin. 



