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1906] ATKINSON—AGARICUS CAMPESTRIS 247 
a close weft, the marginal veil, which bridges over the furrow and 
closes it on the outside” (referring to figure of Agaricus melleus 
copied from Hartic), To be certain that DeBary here refers also 
to Agaricus campestris I quote also from page 291: ‘‘ Most marginal 
veils are formed in the same way as that of Agaricus melleus, and 
jig. 132 of A. campestris will serve to illustrate these remarks.” Fig. 
132 is reproduced from his original work in 1866. In addition, on 
page 295 he says: ‘The account given above of the development of 
the species which are furnished with a marginal veil is founded, 
wherever it departs from my former statements, chiefly upon the 
facts discovered by Hartic and BREFELD;” and on page 297, after 
discussing the different types of development in the Agaricaceae and 
his former statements, he says: “So far as these statements related 
to Coprinus they have been shown by BREFELD’s researches to be 
incorrect; my own did not pay sufficient regard to the earliest stages 
of development. I will not even maintain that they are quite correct 
for Agaricus campestris, . . . . but readily allow that the facts in the 
case are always the same as in A. melleus, and that the first extension 
of the marginal veil over the hymenial surface which was originally 
exposed had there also been overlooked.” 
GOEBEL"? says: “These veil-formations are connected with the 
entire growth of the fructification; the species with a naked pileus 
are by their nature gymnocarpous.” In speaking of the young fructifi- 
cations of A garicus campestris, he says: “These are at first pear-shaped 
bodies composed of young uniform hyphae, and each of these bodies 
is a rudimentary stipe, from the upper part of which the pileus will 
be developed. At an early period the hyphal tissue gives way in 
such a manner as to form an annular air cavity beneath the summit 
of the stalk, this cavity enlarges with the growth of the whole body, 
its upper wall forming the under side of the pileus, from which the 
radial hymenial lamellae grow in downward direction and fill up 
the cavity.” His account thus supports DEBary’s earlier account, 
but the evidence presented in illustrations is not sufficiently con- 
vincing in view of the controverted nature of the question and espe- 
cially in view of the fact that gross anatomy and freehand sections 
. Outlines of classification and special morphology of plants 132-134. 1887. 
English edition. 
