190 ARCHER, ON STEPHANOSPHERA PLUVIALIS. 
taken as regards the Myxogastres. That within the sub- 
stance of the protoplasmic mass of the Myxogastres foreign 
organic bodies have been found, is beyond question; these, 
however, have been confined, I believe, to the spores of the 
plant (?) itself. As to the significancy of the fact, however, 
and into the discussions which have taken place thereon, I 
cannot dare to enter.* 
The analogy of the phenomena here deseribed in Stephano- 
sphera with that which is known of the development of 
the Gregarinida will be sufficiently apparent, the so-called 
‘“pseudo-navicelle,’ like my “primordial cells” ef the 
Stephanosphera, upon leaving the cyst within which they were 
generated, passing into atemporary ameceboid condition; and 
though this, indeed, may be nothing more than an analogy, 
yet it is decidedly still worth noticing. Nor has the similar 
analogy existing between the Myxogastres (Mycetozoa, de 
Bary) and the Gregarinida been failed to be urged by de 
Bary: in argument for the validity of his conclusions in regard 
to the animal nature of the former.t But the arguments 
drawn from this analogy could not, at least, be considered 
equally valid if similarly applied in both instances; for, if 
this analogy with Gregarinida were admitted to have equal 
force in the Volvocinacee (here apparently exceptional, and 
Jess permanent, as the peculiar condition which gives rise to 
it may be) to that which de Bary considers it has and lays 
claim to for it in Myxogastres, its application must, I think, 
lead to deductions, as regards the chlorospermatous alge 
in general, so sweeping and comprehensive as to be totally 
unreasonable and altogether untenable. 
I might, perhaps, have referred to one or two other cases, 
possibly similar to those I have cited of an amoeboid condition 
of the protoplasm within the vegetable cell. I say possibly 
similar; for as the records are not sufficiently copious or 
exact, it does not seem at all certain whether such may be 
really cases in point or may be instances of the actual ingress 
from without of a true animal. Cienkowski’s observationst 
show that his Monas parasitica can make its way into a 
vegetable cell from without, as he witnessed it, through the 
cell-wall, within which it puts on an amoeboid condition. I 
venture to imagine that it may be possible that some of 
Carter’s cases may have been similar to that described by 
* See ex. gr., Hoffman, in ‘ Botanische Zeitung,’ 1859, p. 202; Wigand, 
in Pringsheim’s ‘ Jahrbiicher fir wiss. Botanik,’ Band iii, p. 1; Cienskowski, 
ibid., Band ili, p. 325; de Bary, in ‘ Flora,’ 1862, pp. 264 ef seq. 
T ‘Flora,’ 1862, p. 303. 
+ Cienskowski, “ Die Pseudogonidien,” in Pringsheim’s ‘ Jahrbicher fiir 
wissenschaftliche Botanik,’ Band i, 1857, p. 371, t. xxiv, 2, 3, 4. 
