MEMORANDA. 157 
hydrogen, and nitrogen. We must confess that M. Béchamp’s 
views startle us, and we should like to see them corroborated. 
All microscopists are familiar with peculiar trembling move- 
ments of the particles of matter contained in the cavities of 
crystals. Further, we should like to know how M. Béchamp 
contrived to separate these wonderful organisms, which he 
terms microzyma crete, from the organic remains of the sur- 
rounding foraminifera. A living organism as old as the 
chalk formation is certainly an eighth wonder of the world.— 
Lancet. 
Note on a Double Earthworm, Lumbricus terrestris.—This is 
the only example I have ever seen of a double worm, and was 
given to me last autumn by my friend Mr. Thomas, who re- 
ceived it from a gardener when alive, and soon afterwards 
it was placed in spirits of wine. On account of its xtreme 
rarity, I have drawn up the following brief account of its 
peculiarities. 
The rings of the body presented the usual appearance from 
the first to the eighty-fifth, when the body divided into two 
symmetrical halves (fig. 1), each of which presented the usual 
appearance of the terminal part of the body of an ordinary 
worm. Each of these lateral appendages commenced by dis- 
FIG 2. 
tinct and separate rings applied to the eighty-fifth, and not 
by its bifurcation into two parts. A small triangular mem- 
branous space was thus left on the dorsal and ventral surface 
between the junction of three rings. The following are the 
dimensions of the body and the number of rings : 
Length from the lip to point of bifurcation, 2 inches ; rings, 
85. Each lateral appendage, }th inch; rings, about 105. 
On reflecting the skin from the dual surface of the body 
