FKKS II- WATER A LG X, O F T II E U N I T E D ST A TE 8. 215 



inr;i>tirement.s given above are copied from Prof. Rabenhorst's work. My specimen 



well with it. 



r. iiiaxiiifiriiiii. WOOD. 



1'. cdlulis jrlnlnisis TC! snbglobosis, socpe nonnihil polygonis et in massam indefinite expansam 



couflueiuibus ; cytioplaswatu purpureo, grunulato; cytiodcrmate crasso, baud lamelloso. 

 Diam. CY11 cum. tcgum. ,,J 5B 'oW Tegum. 5B J OD iiiro- 

 Hyn.P. magnificum, WOOD, Proc. Am. Philos. Soc., 1869, p. 144. 

 JIab. In terra buniida, Texas; Prof, llavenel. 



Cells globose or subglobose, often somewhat polygonal and conjoined into an indefinite mass ; 

 eudoi-hrouie purple, granulate ; cell wall thick, not laminate. 



L'I mil, 7.-x. This species, which was collected in Texas by Prof. Ravenel, growing, 

 I believe, on wet sand, is very distinct from the European plant, differing essenti- 

 ally in size and form. In some instances the cells have a greenish tint, but this is 

 ltii->ibly owing to immaturity, as such cells seem smaller than others. The whole 

 m;e.s to the eye has a very rosy purple tint, and although under the microscope it 

 appears much darker and more purple, yet it often retains some of the roseate hue. 

 At the edges of the masses the dark-reddish color often gives way to a very decided 

 greenish tint, presenting an appearance which is very well represented in the 

 drawing of the preceding species, in M. MENGEHINI'S Monoyraphia NostocJiinearum 

 llalicantm, cfcc., Memoire ilella Reale Academia delle Scienze di Torrino. The cells 

 are often closely united by their thick coats into a very coherent mass. With the 

 ordinary cells I have occasionally seen other larger ones, of an orange color, with 

 very thick walls. Are these resting spores? 



Fig. , pi. 19, represents single cells of this plant magnified 750 diameters. 



FAMILY CHANTRANSIACE^E. 



Thallus filamentosns. Fila articulata, e cellulamm eerie nnica formata, ramosa, stricta, nuda, 

 raro passim corticata, rami superne fascicnlatira rarocllosi ; articnli cylindrici. Cytioderma, honio- 

 p'Mi'uin, niaximc hyalinum. Cytioplasma bomogenenm, plerumqne purpurascens. Propagatio fit 

 jxilysporis immobilibus, oralibas, in ramellorum apice vel lateraliter formatis, corymboso aggregatis. 

 Antheridia subglobosa, tcrniinalia. Tetraspora raro observata). 



Thallus filamentous. Threads articulate, formed of a single series of cells, branched, straight, 

 1-are, rarely here and there articulate ; branches above fasciculately branched ; joints cylindrical 

 Cytioderm homogeneous, mostly hyaline, cytioplasm homogeneous, mostly purplish. Propagation 

 by immovable oval polyspores formed on the ends of the branches or laterally and corymbosely 

 aggregate. Antheridia subglobose terminal. Tetraspores rarely observed. 



Genus CHANTRANSIA, FRIES. 



Familise genus unicnro. 



The only genus of the family. 



C. expanna, WOOD. 



C. caespitosa, in lapide stratum saturate violaceo-pnrpnrenm lubricnm, indefinite expansnm, 

 formans; filis purpnreis, modice ramoais, fere 2 lineas longis et ramis plerumque strictis et 

 rectis, ssepe elongatis; raniulis fcrtilibns brevibna, ascendentibus ; articulis diamctro 3-8 plo 



