216 QUARTERLY CHRONICLE. 
remarks ‘ how far the observation now detailed may serve to 
explain the production of cell-walls rising from a nucleus, 
like the glass from the dial of a watch, as originally described 
by Schwann, further investigation can alone determine.” 
The species of Zoophytes and Protozoa noticed by Dr. 
Wright are the following—Stomobrachium octocostatum 
(Forbes). Acanthobrachia inconspicua, nov. gen. spec., 
T.S. W. Atractylis bitentaculata, nov. sp. <Atractylis 
quadritentaculata, noy. sp. Coryne ferox, nov. sp. Boderia 
Turneri, noy. gen. et spec., a Rhizopod. With regard to 
this last form the author makes some interesting remarks. 
He describes a method of reproduction in it by a breaking up 
into pseudo-navicule similar to that occurring in Grega- 
rine, and he believes that such a method of reproduction is 
common among Ameebe. In both Ameebe and Gregarine 
he is disposed to view the nucleus as a true ovum, and 
compares the fission into pseudo-navicule to the fissure stage 
in the ova of higher animals. In the Gregarine and Rhizo- 
pod this is the final process of egg-development—the divided 
elements separating to form a swarm of unicellular indi- 
viduals, whilst in higher animals they remain together to 
constitute a multicellular organism. This view of the case 
of course assumes the “ cell” as an archetypal existence, and 
is rather premature. The exact structure of the pseudo- 
navicule of Gregarine and their homologues in Amcebe must 
be clearly ascertained, and all question as to the male element 
in these animals settled, before any such theory can be 
received. Has it yet been shown that certain pseudo- 
navicule are not males, and others females, in their repro- 
ductive function ? 
Professor Krause, of Gottingen, makes a few,short remarks 
on Dr. Lightbody’s very excellent essay which appeared in 
the first number of the new Journal. He says that the bodies 
described by Dr. Lightbody as nerve ganglion-cells in the con- 
junctiva were recognised ,by him in 1858 as the terminal 
bodies of nerves. They are club-shaped and similar to 
Pacinian bodies, and exist in all eyes, and in various mucous 
membranes, as those of the lips, tongue, generative organs, &c. 
Annals and§Magazinejof Natural History. April.‘ Note 
on the Excavating Sponges; with descriptions of four new 
species,” by Albany Hancock, F.L.S. Mr. Hancock defends 
his views on Cliona published in 1849, against the objections 
raised by Dr. Bowerbank. The most important matter in the 
discussion appears to be whether Chiona bores at all or only 
inhabits galleries previously excavated by “ lithodomous 
Annelids,” as maintained by Dr. Bowerbank. This boring 
