Aquatic Lite 
137 
glass may be painted with hot parafin, 
which makes them more easily removed 
and less liable to stick to the cement. 
The cement base which I have de- 
scribed is very cheap, costing about $1.25. 
The wooden mould or form can be used 
over and over again. 
eres 
(Continued from page 128.) 
derived from a growing knowledge of 
their characters and morphology, as was 
evidenced in the writers of the times. 
Of all the researchers in this field, in 
the period referred to, no single writer, 
or even a number of writers, could in any 
way rival the excellent work of Artedi. 
He was the great Nestor—in fact, father 
of the science of fishes. Zoologically 
and biologically speaking, he greatly fur- 
thered the true ends of ichthyology in all 
of its several departments, and especially 
along the lines of taxonomy, morphology, 
and what was meant exactly by the terms 
genus, species and subspecies. 
Great as were the achievements of 
Peter Artedi, he was much beholden to 
the careful work of some of his prede- 
cessors, especially to that of Ray and 
Willughby. Artedi also derived much 
benefit from the fact that he had studied 
with Linneus at Upsala. Unfortunately, 
his life was a very short one; at the age 
of twenty-nine he was drowned in a 
canal at Amsterdam (1734), 1n which 
city he was engaged upon some ichthyo- 
logical work for a wealthy Hollander by 
the name of Seba. 
In the next part, the Linnzean era in 
the history of the science of fishes will 
be taken up, and brief mention will be 
made of the writers on ichthyology of 
those times. 
—>___ 
Electric lights, placed just above the 
water of the ponds at a Kansas fish 
hatchery, help to reduce the food bills of 
the institution. Thousands of bugs are 
attracted by the glare, and no small pro- 
portion of these drop into the water be- 
neath American Angler. 
— 
These waters are the home of the giant 
black sea bass and swordfish that weigh 
from a hundred to over four hundred 
pounds, all taken with rod and reel. At 
the city pier these fish are hung on racks 
and photographed. A tourist seeing the 
huge fish for the first time looked a black 
sea bass of three hundred and _ fifty 
pounds over from fin to fin. Then, back- 
ing off he remarked: “The man who 
caught that fish is a liar.”—Catalina 
Islander. 
————EE 
Several varieties of fish living near the 
surface of the sea carry light, among 
them being the “lantern fish” of the 
Malay Archipelago and another recently 
discovered in Jamaican waters. All these 
have a large, luminous organ just below 
the eye, emitting a greenish-white light, 
which flickers at regular intervals. Some 
deep-sea fish have the light attached to 
a long movable tip, while others, in addi- 
tion to the chief light organ, are marked 
with patterns of smaller luminous spots 
of varied hues. Some of these are prob- 
ably real lanterns, others decoys in the 
pursuit of prey, some protective, while 
some perhaps only distinguish male from 
female or one variety of fish from an- 
other. All these lights are absolutely 
heatless, something science has not yet 
produced.—Popular Science Monthly. 
ee 
Investigations on the subject of proto- 
zoan parasites at the Bureau’s biological 
station at Fairport, lowa, during the past 
two summers have been productive of 
interesting results, promising to be of 
practical service to fish culture. H. S. 
Davis found that myxosporidia are quite 
