126 Scientific Intelligence. 
in with the one or the other; and in our view it begins with internode, 
i. e. with axis itself, and not with leaf-bearing apex of axis. But if the 
name here really confuses any one’s ideas as to the thing, let us substi- 
tute for internode, Gaudichaud’s original technical esi of merithallus or 
merithalle, and so have done with this verbal argun 
The other argument, to prove that the radicle is a een quid, is, 
at in some respects the behavior of the axis below the cotyledonar Hee 
is ae to that ¢ above, “apart, of course, from the circumstance that 
e one develops a succession of leaves, the other a root.” But the i- 
cle iri the cotyledons, and therefore begins this very succession of 
leaves,—is to the coty ances and the plusule just what the f 
thalle is to its leaf or leaves and the terminal bud; and si oe these 
merithalles, if under and will be pretty sure to produce roots;— 
would produce a root directly from their lower end, no doubt, were that 
not impossible u under the circumstances. What the other Snien 
are is not suggested. Perhaps Dr. Hooker has alluded to them in his 
admirable Memoir on Welwitschia (p. 17), in his references = — papers 
of Clos in the Ann. Sci. Wat., on the collet and on rhizotaxie, Upon 
which it may suffice to remark, that, whatever minor discrepancies there 
may be between the number and disposition of the vascular bundles in 
at., 3,18, t. 16 and 17, and to the original subjects which can so 
readily be examined, as evidence that the radicle, as to internal structure, 
is pa 
tertium can but ts “to be regarded as bast of the stem or ceding axis, 
the same sense as the — internodes of the plant may be so regarded.” 
If an opposite view is. mss we crave an explicit pest re of the 
4, Gothe’s plat y on the Met tamorphosis of Planis, aa into 
English by Emily M. Cox, is published in Dr, Seem ann’s Jo urnal of 
by some explanatory foot-notes by Dr. Masters, which will aid the general 
ler to a correct understanding of this —— essay. It ge be 
well to translate and reprint Wolff’s Theoria Generationis also, A. @- 
5. Equisetum.—tIn the same useful prea (for November, 1863,) is 
a translation of a paper by Dr, Milde, On the pina Distribution 
uisetacee. In the summary it appears that 
At present only 26 pieces of Hquisetum can be d istinguished w with 
certainty, viz: ten E. pcm sibery E. arvense L., E. Braunii Milde, 
_E. Telmateia Ehr., E. sylvaticum L., £. diffusum E. Bogotense 
HS Fone E. palustre L., E. limosum L., and £, littorale Kabler); 
sixteen E. CRYPTOPORA, as Martii Milde, £. zy Met 
