REVIEWS. 43 
outwardly to some other animal, or the water, and then back to another 
Anhinga, is wholly unknown.” 
SCIENTIFIC OPINION.* — A weekly journal showing the progress of sci- 
ence in all its departments, is a most welcome publication. It is edited 
with great ability, and its kite poet deserve especial notice for 
their plain speaking and candor. No other journal known to us reports 
so promptly and fully the Proceedings of Scientifie Societies, especially 
the German and French. Both this and the Paris Cosmos, a favorite ex- 
change with us, will doubtless have a wide circulation in America, as 
science is atiaintu ng such proportions that we on this side of the water 
must receive weekly scientific intelligence from Euro 
FAUNA OF THE GULF-STREAM AT GREAT DEPTHS.t|— This is the con- 
tinuation of a similar paper by the same author previously reviewed. 
The utmost depth reached with the dredge was 517 fathoms, or 3102 feet, 
or over 1000 feet beyond the late researches near Spitzbergen. The bot- 
tom has been divided into three regions, extending in zones around the 
e 
depth of 90 fathoms; 2d, From 90 to 250 or 350 fathoms; 3d, The bottom 
of the channel which does not much exceed 500 fathoms. The first region 
is barren, and covered only by dead and broken shells, Sapien: that the 
Th 
us 
ecu sa the tubes of Serpuls, the interstices filled up by Foraminif- 
æ, and smoothed over by the Nullipores. It is supposed by the author 
d this sth eventually thicken until the water is shallow enough for the 
Astreans and Madrepores to begin their work of founding a new barrier 
similar to the x reefs. This limestone is filled with recent fossils, 
furnished in great part by the animals now living on the bottom, but **a 
few contribute by sinking after death from the higher regions of the su- 
perincumbent water (teeth of fishes and shells of Pteropods), and others 
are brought by currents from littoral regions (bones of the Manatee, and 
fragments of littoral plants). All the branches of the animal kiagdoni, 
so far as their marine carnivorous orders are concerned, are abundantly 
represented in this region, but it is destitute of plants. 
The third region is sparsely inhabited by a few Mollusks, Radiates, and 
Crustaceans, but the peculiar animal is the microscopical Globigerine 
e 1 
of smaller size than allied forms of the littoral zone. “The only excep- 
tion is an Echinus, which is nearly of the average size, and an Actinia. 

* Scientific Opinion. AW dof ific P t d Abroad. Part, 
December; II. January, 1869. 4to. Monthly Parts, 1s .6d. London, 1869. 4to,3 columns. 
t Bulletin of the Museum of Zoology, No.7. Contributions to the Fauna of the 
Gulf-stream at at great depths. (Second series.) By L. F. Pourtales, Ass't U. S. Coast Survey. 

