22 BULLETIN OF THE 
The two charts of Zootalassographia given by Chierchia for the At- 
lantic and Pacific show at a glance the general character of the surface 
fauna at the various localities at which the “ Vettor Pisani” used the 
tow-net, and also in the Pacific chart the contents of the deep-sea net, 
and the depths to which it was lowered. But, as I have stated above, 
there is no proof as yet that the fauna and flora reported by the “ Vettor 
Pisani” as living at the depths indicated by the record did actually live 
at those depths. We may leave out of consideration the catches of 
Siphonophores on the dredging and sounding wires, as well as a large 
number of hauls at depths of 100 to 400 meters, depths which are not 
in question ; and as regards the contents of the self-closing net in use 
on the “ Vettor Pisani,” sent to depths in one case as great as 4,000 me- 
ters, it would add nothing to the discussion of the greatest depth at 
which pelagic animals are found, owing to the untrustworthiness of the 
working of the net. Of course, the same objections hold equally good to 
the results claimed from the contents of tow-nets sent to depths vary- 
ing from 1,000 to 2,300 meters. 
OBSERVATIONS ON THE PELAGIC FAUNA BY THE PRINCE OF 
Monaco. 
In a German translation by Marenzeller’ of the notices of the pelagic 
work of the yacht “ Hirondelle” scattered through the Comptes Rendus, 
will be found an account of the experiments of the Prince of Monaco. 
Off Monaco he lowered a trap to a depth of 1,200 meters from the 
surface and 300 meters from the bottom, and obtained a species of 
Paralepis. 
The Prince of Monaco has invented a number of most ingenious pieces 
of apparatus for collecting the surface fauna and that which may live 
at intermediate depths, but neither his apparatus nor that of Fol, who has 
experimented in the same locality, has been sufficiently tested to enable 
us to judge of its value.? Fol’s apparatus, from his own account in 
“La Nature,” is very sensitive to the rising and falling of the ship. 
The Prince of Monaco discarded the use of the Chun-Petersen net, as 
he found more or less gaping of the mouth frame, after it was supposed 
to have closed, during the whole of its ascent to the surface. 
1 Zur Erforschung der Meere und ihrer Bewohner, gesammelte Schriften des 
Fiirsten Albert I. von Monaco, von FE. v. Marenzeller, 1891. 
2 His large pelagic beam-trawl, if I may so call it, in use on the “ Hirondelle,”’ 
should prove a valuable machine for collecting surface animals. 
