364 ZOOLOGY. - 
- fungus came out all over the stump of the tail, the fish became 
sick, and was apparently dying. At the time I knew nothing of 
the nature of the destructive fungus, but having my attention called 
to the case, I at once concluded that I had to deal with some 
parasite, and resolved to try to exterminate it. . The only caustic 
available happened to be strong nitric acid, a few drops of which I 
applied to the affected tail stump, allowing it to remain a moment 
or two, after which I rinsed it off in clean water, and restored the 
fish to the tank. Of course the parasite was killed; the patches of 
fungus sloughed off, and the sick fish soon became well and healthy. 
A few days later I thought I saw more of the fungus appearing upon 
the previously affected part ; but, upon looking more closely, found 
that the appearance was really due to the growth of new rays. In 
the course of a month a new tail fin, perhaps a fourth of an inch 
long, had appeared, which continued to grow rapidly, so that in 
three months from the time of my experiment the fish could not be 
distinguished from others in the aquarium. The lost tail was repro- 
duced with absolute perfection, the reproduction taking place not 
only under my own eyes, but also under the observation of several 
competent witnesses. i ; 
This case seems to me interesting as a confirmation of what 
was already known, and also as showing that the reproduction of 
the lost part was not prevented even by the application of one 
the most powerful and destructive of all caustics. —F. W. CLARK. 
Tae Kixerets IN New Jersey.— We are somewhat surprised 
to find it stated in the latest work on North American ornithology 
that the two kinglets (Regulus satrapa and R. calendula) are not 
known to breed in the United States, but that a few are believed — 
to remain throughout the summer in Maine, “and probably breed 
in the dense Thuja swamps.” Both of these kinglets are quite 
abundant in New Jersey from early autumn until late in spring, 3$ 
is well known ; and we have twice stated (Geology of New J erm 
1868, p. 769, and volume iv of this Journal), that a few a 
viduals remain, during the breeding season, among the monii 
of Sussex county of this state. Both there and in the adjacent 
territory of Monroe and Pike counties, separdted from Sussex 
county by the Delaware River, here a narrow stream, the kinglets, 
a T E E E 
*A History of North American Birds by Messrs. Baird, Brewer and pidgw?”: 
Land Birds. Vol. i, p. 73-76, Boston, 1874. 
REE GATE Pe et Eg y 
Fs Se oy yey ees Sess aes R Pee 
A nee Nba, <a UA Re Boe rai dg ae Ta ences CA bres tO atau a eee 
