192 Rhodora [OCTOBER 
by about 12 и in width. The marginal teeth are sometimes absent 
altogether, and it is rare to find more than one tooth on a lobe, con- 
sisting usually of a single projecting cell. ‘The underleaves are minute 
and are not always present. ‘The lobes of the perigonial bracts are 
toothed, but the teeth are more numerous and better developed on the 
perichaetial bracts; they differ in length and extend irregularly in 
various directions. ‘The perianth is long and in the form of a triangu- 
lar prism, minutely crenulate at the mouth from projecting cells. 
Gemmae are frequently present and are usually borne at the tips of 
more or less elongated branches where they form spherical masses. 
They are elliptical in form with thin walls and rounded ends; they 
measure about 17X9 у and are usually bicellular. As a rule it is quite 
impossible to distinguish leaves in the gemmiparous region, although 
this is not always the case. 
The original specimens of Jungermannia elachista, collected by 
Jack at Salem in Baden and distributed by Gottsche and Rabenhorst, 
are badly mixed with a second species of Cephaloziella, which Schiffner 
refers to C. byssacea (Roth) Schiffn. (— the C. divaricata of many 
authors). In the set of the Hepaticae Europaeae in the Eaton her- 
barium, No. 574 is made up almost entirely of this second species, but 
the few sterile stems which seem referable to J. elachista agree with the 
Massachusetts specimens. ‘The range of variation and the relation- 
ships of the species are not yet clearly understood. 
6. CEPHALOZIELLA HAMPEANA (Nees) Schiffn. Oesterr. Bot. 
Zeitschr. 54: 256. 1904. Jungermannia Hampeana Nees, Natur- _ 
geschichte der europ. Leberm. 3: 560. 1838. Cephaloziella trivialis 
Schiffn. Lotos 48: 341. 1900. C. erosa Limpr.; Warnstorf, Krypto- 
gamenfl. der Mark Brandenburg 1: 233. f. 6. 1902. Cephalozia 
erosa Massal. Malpighia 21: 36. 1907. On a rotten log in a 
swamp; near Schoodic Lake, Piscataquis County, Maine (A. W. Е.). 
On moist rocks; Naugatuck, Connecticut (А. W. E.), sterile; speci- 
mens with male and female flowers afterwards collected in the same 
locality by Miss Lorenz. Not before recorded from North America 
but widely distributed in Europe. The above synonymy is mostly 
quoted from Schiffner, who suggests that it be accepted somewhat 
tentatively, the relationships between the present species and the 
closely allied C. bifida (Schreb.) Schiffn. being not yet definitely 
established. ‘The specimens which are here referred to C. Hampeana 
agree closely with the type material of C. trivialis, collected by Dreesen 
