152 Rhodora [SEPTEMBER 
termination are still further increased, and species of other genera 
with undivided leaves, such as Jungermannid, Jamesoniella and 
Odontoschisma, are likely to be mistaken for the Nardia. 
In its typical development N. hyalina forms more or less compact 
tufts, with the stems prostrate to somewhat ascending. The color 
is a pale or yellowish green, and the living plants show *a peculiar 
Figs. 1-9. NARDIA HYALINA (Lyell) Carringt. 
1,2. Stems with perianths, dorsal view, X 15. 3. Male stem, dorsal 
view, X'15. 4. Cells from the median portion of a leaf, x 265. 5. Mar- 
ginal cells from the same leaf, X 265. 6,7. Median and marginal cells from 
a leaf of another specimen, x 265. 8. Median cells from another leaf of 
the second specimen, X 265. 9. Cells from the mouth of a perianth, inner 
surface, X 200. Rhizoids and the verruculae on the leaf-cells are not shown. 
Figs. 1, 3, 4, 5 and 9 were drawn from a specimen collected at Brandon, Ver- 
mont, by D. L. Dutton 726; the remaining figures, from a specimen collected 
at Naugatuck, Connecticut, by the writer. 
