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Atkinson-— A Monograph of the 
spores clustered in the antherid-zones rarely fading so as to be 
nearly colorless. 
Habitat. Mill Brook, Shelbourne, N. H., Dr. W. G. Farlow ; 
Bussey Brook, Jamaica Plains, Mass., Miss Clark, and Mr. 
Faxon (ex parte) ; Belleville, Ont., J. Macoun ; Painsville, 
Ohio, streams of Pa. and some other places, not noted on 
specimens from Herb. Rev. Francis Wolle; Island Brook, 
Bridgeport, Conn., specimens little branched, Isaac Holden ; 
specimens simple, and appearing to vary in form of antherid- 
zone to the next variety, Isaac Holden and W. A. Setchell ; 
Franklin, Conn., W. A. Setchell; Westrock Cascade, New 
Haven, Conn., D. C. Eaton ; Sargent’s River, Woodbridge, 
Conn., O. D. Allen ; Little Otter Creek, Ferrisburg, Vt., Mr. 
Faxon ; Ithaca, N. Y., Prof. W. R. Dudley and J. M. Sted- 
man ; Oregon, Elihu Hall ; small specimens from San Ber- 
nardino, Cal., S. B, Parish ; Ellenville, N. Y., Mrs. Britton ; 
Nepsiquit river, N.B., J. Fowler; Pirates’ Cove, Nova Scotia, 
J. Macoun. 
Var. 1 6, viviana, stout, profusely branched, procarp-zone 
with antherid-zone next above somewhat clavate, especially 
at maturity and near the distal end ; papillae 3-7, often con- 
fluent, prominent in age; tending to blacken by drying when 
mature. 
Habitat. Island Brook, Stillman’s Brook, Conn., Isaac 
Holden; Bussey’s Brook, Jamaica Plains, Mass., Mr. Faxon 
(branched forms). 
Specimens too young for characterization, but probably 
belonging to this species, were sent me by Prof. Edward 
Burgess, collected at Harper’s Ferry. 
1 I have used the name which Sirodot gave to a variety of his rigida , with 
which these specimens agree. 
