TUOMEYA. 53 



Genus 2, TUOMEYA, Harvey. 



Filaments cartilaginous, continuous, solid, at first transversely 

 banded, afterwards annularly constricted ; composed of a longi- 

 tudinal axis, and two strata of periplieric cells. Axis columnar, 

 consisting of several longitudinal cohering filaments, beset with 

 closely placed whorls of moniliform ramuli, whose branches 

 anastomose horizontally and vertically into a cellular peripheric 

 membrane, which is coated externally with moniliform filaments, 

 gradually developed. 



TUOMEYA FLTJVIATILIS, Harvey. 



1 ' Grows in tufts an inch or two in length, scarcely as thick 

 as a hog's bristle, much and irregularly branched, bushy ; 

 the branches alternate or secund, scattered or crowded, twice 

 or thrice divided and set with scattered patent ramuli which 

 are slightly constricted at the interstices and taper to an 

 obtuse point. When young, the branches and the ramuli 

 are perfectly cylindrical. 



"In old, fully developed specimens the branches and 

 ramuli are annularly constricted at short intervals, the 

 nodes becoming swollen, whilst the iiiternodes remain un- 

 changed. When a young branch is bruised between two 

 pieces of glass the axis may be readily extracted. It con- 

 sists of several parallel longitudinal jointed threads com- 

 bined together at closely -placed nodes, from which issue 

 horizontal dichotoniose filaments, composed of roundish or 

 angular cells. In the young plants a portion of the filament 

 between the axis and periphery is hollow, but in older ones 

 the cavity is quite filled up with cells. The color is a dark 

 olive. The substance is brittle, rigid when dry. The ex- 

 ternal habit, substance and color are those of Lemanea, and 

 without microscopic examination it might pass for one, 

 but, as may be gathered from the above description, it is 

 very different from Lemanea in structure.'' -Harvey, Nereis 

 Boreali Americana. Part 3, p. 65. 



On stones in rivers and streams, Alabama, Prof. Tuomey. 

 Near Fredericksburg, Virginia, Prof. Bailey, 1844 and 1845. 

 I have no knowledge of this plant, have simply copied Prof. 

 Harvey's description. 



Plate LXVI, fig. 1. An ideal form of the plant. No 

 sketches extant, and no preserved specimen to be found. 



TUOMEYA GRANDE, Wolle. (Eiitothrix grande, Wolle. Bull. 



Torrey Bot. Club, November, 1877, p. 17.) 

 Filament simple, tubular, cartilaginous, light olive, to 



