232 Miscellaneous. 
All depths of the lake have furnished Gammaride. The greatest 
depth to which the author has hitherto carried his dredgings, namely 
1373 metres, proved to be as well peopled as the littoral zone, 
although the number of species was less than at higher levels. 
However, this comparative poverty seems to be attributable to the 
fact that the exploration of great depths is attended with great dif- 
ficulties. Dr. Dybowsky has no doubt that more regular investiga- 
tions carried on between 500 and 1300 metres would be recompensed 
by the discovery of new species. 
Most of the Gammaride of Lake Baikal which live at small depths 
are vividly coloured; but with the increase of depth the coloration 
gradually diminishes, and the species living below 700 metres are 
more or less whitish in tint. Some varieties, coming from greater 
depths than those inhabited by the specific type, are distinguished by 
the paleness of their bodies and eyes, and also, in some cases, by the 
more elongated and slender form of their locomotive appendages.— 
Hore Soc. Ent. Ross. Bd. x. Supplement; Bibl. Univ., Bull. Sci. 
1874, p. 372. 
On the Mode in which Ameeba swallows its Food. 
By Prof. J. Lemy. 
The author remarked that he had supposed that Amaba swallows 
food by this becoming adherent to the body and then enveloped, 
much as insects become caught and involved in syrup or other 
viscid substances. He had repeatedly observed a large Ameba, 
which he supposes to be A. princeps, creep into the interstices of a 
mass of mud and appear on the other side without a particle ad- 
herent. On one occasion he had accidentally noticed an Ameba 
with an active flagellate infusorium, a Urocentrum, included between 
two of its finger-like pseudopods. It so happened that the ends of 
these were in contact with a confervyous filament; and the glasses 
above and below, between which the Amaba was examined, effec- 
tually prevented the Urocentrum from escaping. The condition of 
imprisonment of the latter was so peculiar that he was led to watch 
it. The ends of the two pseudopods of the Ameba gradually ap- 
proached, came into contact, and then actually became fused—a 
thing which he had never -before observed with the pseudopods of 
an Ameba. The Urocentrum continued to move actively back and 
forth, endeavouring to escape. At the next moment a delicate film 
of the ectosare proceeded from the body of the Amwba, above and 
below, and gradually extended outwardly so as to convert the circle 
of the pseudopods into a complete sac, enclosing the Urocentrum. 
Another of these creatures was noticed within the Amwba, which 
appeared to have been enclosed in the same manner. 
This observation would make it appear that the food of the 
Ameba ordinarily does not simply adhere to the body, and then 
sink into its substance, but rather, after becoming adherent to or 
covered by the pseudopods or body, is then enclosed by the active 
extension of a film of ectosare around it.—Proc. Acad. Nat. Sci. 
Philad. p. 143. 
