‘ 536 
** Odgonia aggregated. 
§ Terminal divisions elongated, much longer than the primary; odspore 275 
#¢ long, membrane reticulated. N. subglomerata A. Br. 
$$ Terminals abbreviated, less than half as long as the primary divisions. 
a. Terminals one-half to one-fifth the length of the primaries, odspore 
240 w long. - WN, stellaris Allen. 
4. Terminals unequal, scarcely more than one-tenth the length of ‘he 
primaries, odspore 300 7 long. ~ N. capitulifera Allen. 
++ Sterile divisions somewhat exceeding the contracted, fertile verticils; odspore 225 # 
long, membrane smooth. N. subspicata Allen. 
+44Sterile divisions long overtopping the globular condensed, fertile verticils ; 
odspore 400 4 long, membrane coarsely granular. N. glomerulifera A. Br. 
Internal Antidromy. 
By GEeorGE MACLOSKIE. 
Prof, W. J. Beal showed in the American Naturalist of 187 3 
that cones of opposite spirality grew on the same pine tree. Al- 
though for a time I failed to see matters in this way, I have, with 
the assistance, or rather the guidance, of Prof. G. L. Goodale, come 
to endorse all that Prof. Beal wrote; and furthermore, I find that 
the phyllotaxy as well as the conotaxy is two-fold on different 
parts of the same tree of the Coniferae. The branches of succeed- 
ing years appear to be often relatively antidromic, and also the 
side branches along one of the primary branches, and each cone 
appears to harmonize in its spirality with the branch which bears 
it, though there are apparent exceptions to this rule which may be 
due to the suppression of branches. Of course these phenomena 
cannot be observed in non-branching Gymnosperms, as the cy cads, = 
nor in tree ferns. : 
But in the London Natural History Museum I found a branch- 
ing specimen of Lepidodendron Sternbergu (from Lanarkshire, Scot- 
land) in which the leaf scars of stem and of one branch were 
-dextrorse, whilst those of the other branch of the dichotomy | 
were sinistrorse. This phenomenon strongly recalled the condi-_ 
tions of the forking rootstock of the water lily (Wuphar) and other | 
plants. a | Se 
_' ‘The general outcome of these facts is that the law of Coat 
_dromy is more complex than was first apparent; a result which 
