226 THAXTER. — MONOGRAPH OF THJ^ LABOULBENIACJLE. 
receptacles, the most striking and peculiar is seen in Kainoviyrcs, the massive receptacle of which gives 
rise to lateral axes of superposed cells terminated by perithecia, Plate LXXI, figs. 20-21. Zodiomyces 
and Euzodiomyces, both conspicuous for their massive receptacles, also produce their perithecia termi- 
nally on short branches, as has been already mentioned. A very peculiar type which seems to belong here, 
although no young material has been examined, is seen in Clematomyccs, Plate XLIII, fig. 1. Here a 
stout main axis, consisting of a double row of cells, gives rise to a variable number of branches similar to 
it in structure; but how much of the former corresponds to the basal spore segment it is not possible to say. 
Lastly the genus Die homy ces which, by assuming a scale-like habit, has beautifully adjusted itself to 
its life on the abdomen of a swiftly running host, illustrates a condition in which a seemingly broadly 
Multicellular primary receptacle consists in reality of a central and invariable axis of superposed cells, 
corresponding to the basal spore segment, which produces branches right and lef-t above the basal cell, 
in many species symmetrically paired. Although these branches may be variably united to one another 
above and below, and thus give the appearance of a cellular mass, they may in other cases be almost 
especially the upper pair, as is well illustrated by D. bif< 
g. 3. The 
genera Peyritschidla, Limnaiomyces, Chitonomyces and Hydrceomyces are all more or less evidently 
similar in the development of their receptacles. In the very closely allied genera Rickia and Distich- 
omyct , which, however, form a well marked group by themselves, the development of the receptacles, 
which is given in some detail below under these genera, although of a different character from that of the 
I)ich(>myce.s-ty\K\ is similarly resolvable into series of coherent branches. 
Before leaving the subject of receptacles, attention should be called to certain peculiar modifications 
of the basal cell which are evidently protective, acting as supports or buffers, and consist of more or less 
indurate. 1 outgrowths, most conspicuously illustrated by Klcirliomyccs, Plate XXXVII, fig. 3, and to a 
less extent by Corethromyees Stilin, Plate L, figs. 6-9. A similar supporting and protective function is 
no doubt served by the blackened fork-like upgrowths from either side of the subterminal tier in many 
species of Diehomyces, Plate XXXII, although these structures, being modified tips of lateral branches, 
are morphologically quite different. In this connection the remarkable extension of the basal cell in 
species of Dimorphomyres, and especially in D. Myrmedonm, Plate XXVI II, fig. 14, should be referred 
to, forming as they do a continuous supporting margin below the laterally developed sympodial peri- 
thecigerous branch. The small beginnings of conditions such as the two first above mentioned, are to 
be found in such occasional modifications as were formerly described and figured in connection with 
Laboulbenia PhihtUM and Compsomyres verticiUaius, Monograph, Plates XI, fig. 13 and XXII, fig. 28 
and the foot-like modification of the receptacle in various species of Ceratomyres undoubtedly serve a 
similar puq>ose. 
Appendage *. An appendage of some kind is pr< lent in all genera with the single exception of A morph- 
omyrr,, which in this, as in other respects, is the simplest known generic type. In all others, the spor 
being two-celled, the distal segment is transformed into a structure corresponding to a primary appendage, 
although in male individuals of unisexual types having simple antheridia, like DiMcomyces, the distal 
— . The new genera here included 
ol or few general types not described in the former Monograph; but certain ones need special mention, 
which may be more conveniently made in connection with a brief review of the more important types of 
anth-ruha. The distinction between the primary appendages, which are always derived from the upper 
segment 
