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species, of which thirty-one species also occur in Florida and eight 
in Bermuda. Only one of these is apparently undescribed and 
endemic, Hymenostomum flavescens; two are extensions of range 
southward, Desmaitodon Garberi, which has heretofore only been 
known in Florida, and Schlotheimia Sullivantii; four are extensions 
of range northward of the following West Indian and South 
American species, Fissidens monandrus, F. radicans, Syrrho- | 
bodon Gaudichaudit, and Trichostomum rivale; four are cosmo- 
politan, Funaria hygrometrica and F. flavicans, Bryum capillare, 
and B. coronaium. Reference was made to the fact that New 
Providence is the type locality for Octoblepharum albidum. De- 
scriptions will appear in the Flora of the Bahamas, now in press. 
Keys to the families were exhibited. 
Comment and discussion was stimulated by the fact that twelve 
of the thirty-five species are only known from sterile specimens, 
which apparently are maintaining a precarious existence, as five 
of them are propagating only by brood-bodies, while several 
others are distributed by brittle stems, branches, or leaves. Dr. 
Harper made the point that these were all offshoots from the 
gametophyte and Mrs. Britton replied that in several mosses, 
notably Hyophila riparia, where the paraphyses surrounding the 
undeveloped archegonia produced propagulae and in one case of 
Octodiceras Juilana, where the calyptra gave rise at apex to the 
protonema, these vestigial organs derived from the gameto- 
phyte were carried over with the sporophytic stage. 
Mr. R. S. Williams reported on “The Genus Desmatodon in 
North America and southward to Colombia and the West In- 
dies.” The work on this genus was mostly done some four or five 
years ago, and but little has since occurred to cause any impor- 
tant changes. Twelve species are now included in the genus as 
against thirteen in the Lesq. & James’ Manual, but two of these 
thirteen species, D. neomexicanus and D. nervosus belong to Tor- 
tula while one other, D. arenaceus is reduced to D. obiusifolius. 
This leaves ten of the Manual species, the two additions being 
D. Sprengelii, originally from Santo Domingo and discovered in 
Florida in 1916 by Dr. Small, and D. stomatodonta from Jalisco, 
Mexico. 
