332 
The next experiment was conducted with more success. The 
parent fish were similarly captured on January 27th, 1837, sub- 
sequently killed, and their skins preserved. The male when 
taken weighed 16lbs., and the female 8lbs. On May 7th, or 
101 days after removal from the parent fish, the eggs hatched. 
He gave illustrations, life size, from examples ten days old, 
forty-eight days, two months, and six months of age, while no 
marked difference could be observed between them and the par 
in the river of a corresponding age. 
ParwneEu (“ Fishes of the District of the Forth,” 1838, page 
298) gives the Salmo salmulus, or par, as a distinct species 
observing “that if we compare a young salmon of eight inches 
in length with a par of equal size, both taken from the same 
river in the month of May, we shall find them to differ in the 
following respects ;” and then follow his reasons for this 
opinion. He remarks that “it is generally supposed that those 
small fish, from four to five inches in length, which are found 
so plentiful in many rivers during the autumn months, and 
which are marked on the sides with from ten to eleven trans- 
verse dusky bands, and a black spot on each gill-cover, are 
either all pars or the young of the salmon. But from a minute 
examination of several hundreds of these fish, taken in various 
rivers in England and Scotland, I am induced to consider them 
as not all of one species, but the young of various species 
or varieties of migratory trout, in company with the young of 
the salmon, with the Salmo salmulus or par, and with different 
varieties of the common fresh-water trout; all of which have 
received the names of Heppers, Brandlings, Samlets, Fingerlings, 
Gravellings, Lasprings, Skirlings, and Sparlings.” ‘There are 
still great doubts as to the par being a migratory species, since 
no instance has been recorded of its capture in the sea. Nor 
does it appear to me to be so common a fish as is generally 
considered.” 
Tompson (“Natural History of Ireland,” 1856, being a 
reprint of many of his papers, written at various dates) terms 
the par a gravelling, the young of the salmon (vol. iv., page 
148). “The remark of Pennant, that ‘the adipose fin is 
—— en ee 
