220 
POPULAK SCIENCE REVIEW. 
glol)ules of the future embryo. After fecundation these two elements 
separate, and the difference of the phenomena arises from the fact that in 
certain animals the separation takes place after the segmentation of the 
cell-egg, in others before the segmentation. — Scientific Opinion, February. 
Fauna of the Gulf-Stream. — The American Superintendent of the Coast 
Survey recently ordered a number of investigations to be made on this 
point, and a certain amount of work in this direction has already been ac- 
complished. The line of the present survey was in a section between Key 
West and Havana, incidentally with the purpose of sounding out the line 
for the telegraph cable.’’ Although the work was interrupted, and the casts 
made with the dredge few, the interesting fact was disclosed that animal 
life exists at great depths, in as great a diversity, or as great an abundance, 
as in shallow water.” By two casts in two hundred and seventy fathoms off 
Havana, Crustacea and worms, numerous dead shells of gasteropods and 
pteropods, living terebratulae, and seven species of bryozoa, besides echini, 
star-fishes, and an abundance of corals, hydroids, and foraminiferae, were taken. 
Only one species of seaweed, however, was mixed with this luxuriant 
animal life, which corresponds with similar results of deep-sea dredging in 
the European seas, and shows that the greater number of deep-sea animals 
must be carnivorous.” — Vide Bulletin of the Museum of Comparative Zoology, 
No. 6. 
Animal Life in ivater at great pressure. — In proof of Dr. Carpenter’s idea 
that the pressure of water has little effect on the vitality of animals, M. 
Deville has at his laboratory an apparatus erected by M. Cailletet, in which 
fishes are living under a pressure of 400 atmospheres, proving that the 
greatest depths of the ocean may be habitable. 
The Horse in pre-Historic times. — In his paper this year communicated to 
the Royal Society on the fossil equine remains of the Cave of Bruniquel, 
Professor Owen states that the sum of the several comparisons was to refer 
the equine fossils from sedimentary deposits, and both varieties from the 
Bruniquel cave, to one and the same species or well-marked race belonging 
to the true horses, or restricted Equus of modem mammalogists j the indi- 
viduals of which race, with a small range of size, probably due to sex, were 
less than the average-sized horse of the present period, but larger than 
kno\NTi existing striped or unstriped species of Asinus, Gray. 
lygmphatic Vessels in the tail of Batrachians. — An abstract of a paper 
on this subject by Herr Danger appears in a recent number of L'Institut. 
Herr Danger has ‘found that, in addition to the canals which can be de- 
tected by injection, there are very many other lymphatic vessels which 
pass from the part where the injection ends to the border of the fin. 
These borders are clearly defined, rectilinear, and without dentations. The 
general character of walls, and the form of the nuclei in them, differ very 
little from those of the capillary blood-vessels. The limiting envelope of 
these lymphatic vessels are, according to Herr Danger, very readily observed. 
In many places they may be seen freely anastomosing. He states that those 
lymphatics which end in a ceecum may seem to arise from the walls of the 
capillar}’ vessels where they, as it were, start from a nucleus. Herr Danger 
thinks that there are many other points in this branch of [histology which 
remain to be worked out. — Vide Hlnstitut, Feb. 27. 
