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POPULAR SCIENCE REVIEW. 
do not differ specifically from the existing B. americanus and B. europceus. 
They are at the utmost varieties of the same species. 
Bos primigenius, Bojanus, is still represented by a numerous race, varieties 
of which occupy the ground between the embouchures of the Loire and 
Gironde, extending towards the south-east as far as Mont Aubrac. To this 
form M. Sanson gives the name of Bos taurus ligeriensis. 
Bos trachoceras , Meyer, and B.frontosus, Nilsson, belong to a single species, 
M. Sanson’s B. tauius jurassicus. This race, which is constantly extending, 
at present inhabits the cantons of Berne and Fribourg in Switzerland, and 
La Bresse and the valley of the Saone, is spreading more and more into 
the districts of Le Nievre, Cher, and Allier in France, and is also dis- 
seminated in Germany, Austria, and Italy. It is one of the types found in 
the Lake-dwellings. 
Bos longifrons, Owen, is an ancient representative of the existing Bos 
taurus batavicus. Its remains have never been found outside of the natural 
geographical area of the latter, included in the basin of the North Sea, and 
extending into England, Holland, Belgium, and the north of France and 
Germany. The craniological type of this race has most clearly defined 
characters, so that it is difficult to understand how it can ever have been 
confounded with that of Bos primigenius. 
Bos brachyceras, ftiitimeyer, survives in the Braunvieli of Switzerland, 
named by M. Sanson Bos taums alpinus , as it inhabits the region of the 
Alps, where it has formed numerous varieties. 
Bos brachycephalus, Wilcken, remains of which are found in the peat of 
Laibach, is supposed by its describer to be derived from the European Bison. 
It is identified by him with a race existing in Tyrol, which was formerly 
regarded as a hybrid of Bos frontosus and B. brachyceras. This is regarded 
by M. Sanson as its most probable origin. 
Sulphuret of Carbon for Killing Insects. — Dr. J. M. Eder proposes the use 
of a sulphuret of carbon bottle for killing insects in place of the cyanide of 
potassium bottle which is now so commonly employed. He describes it as 
particularly well adapted for beetles. The apparatus recommended is a 
wide-mouthed bottle, well-corked, containing a few fragments of blotting- 
paper. When an insect i3 captured and put into the bottle it is to be followed 
by three or four drops of sulphuret of carbon (a supply of which must be 
carried in a small store-bottle), when the animal is almost instantaneously 
killed by the action of the vapour produced. The largest beetles die in a 
few seconds. With careful corking after the introduction of each capture, 
the three or four drops of sulphuret of carbon will continue their action for 
an hour or two, but as soon as the insects begin to die slowly, a fresh supply 
of the reagent must be added. The great advantage is that owing to the 
rapidity with which sulphuret of carbon evaporates, the interior of the 
vessel is always perfectly dry, so that no insect, however delicate, can be 
injured by it. Solution of cyanide of potassium is said to beslower in its 
action, and to have the disadvantage of introducing moisture, and of giving 
origin to carbonate of potash, a hygroscopic salt. — ( Verhandl . Zool. hot. 
GeseLlsch. in Wien, 1878.) 
Sounds produced by Fishes. — M. W. Sorensen, during a residence at the 
mouth of the Riacho del Oro (Paraguay), had the opportunity of investigat- 
