1895.] Distribution of the N. Am. Marchantiacee. 67 
CONOCEPHALUM® Wiggers, Prim. Fl. Hols. 82. 1780,appears 
to be the oldest available name for what was called Conoceph- 
alus by Necker (1790), and Fegatella by Raddi (1818), since 
the earliest name, Hepatica Micheli (1729), is excluded by the 
Code. Our only species is 
22. Conocephalum conicum (L.), nom. nov. 
Marchantia conica L. Sp. Pl. 1138. 1753- 
Widely distributed from Tennessee to California and north- 
ward. 
I have specimens from Newfoundland, New Brunswick, 
Maine, New Hampshire, Vermont, Massachusetts, Connecti- 
cut, New York, New Jersey, Delaware, Virginia, Tennessee, 
Ohio, Indiana, Illinois, Wisconsin, Minnesota, Missouri, Ne- 
braska, Idaho, California, Washington, British Columbia, 
Ontario and Alaska. 
23. CRYPTOMITRIUM TENERUM (Hook.) Aust. 
Central California: Palo Alto, Campbell; San Bernardino, 
Parish; Pasadena, McClatchie. Also reported from Mexico 
by Gottsche. Hitherto this has been very rare but Prof. Mc- 
Clatchie has recently collected it in considerable abundance. 
It becomes necessary to make another change for the genus 
which has always been known in America under the name of 
Preissia. CyATHOPHORA S. F. Gray (1821) appears to be the 
oldest name, though Lindberg rejected it because of the moss 
genus Cyathophorum Pal. de Beauv (1805). It is a little 
singular that both Lindberg and Schiffner adopted Chomzo- 
¢arpon Corda over Pretssia Corda, for while both have the 
Same date of publication the latter has priority of place. 
There has been fully as much difficulty with the specific name 
and there has consequently arisen an extensive list of 
Synonyms. This has been aggravated by the attempt in Eu- 
Tope to maintain the autoicous form as a distinct species from 
the dioicous form. There seems to be no further reason for 
Maintaining this distinction. If we have one species it will 
¢ known as 
24. CYATHOPHORA QUADRATA (Scop.) Trevis Mem. R. Ist. 
___Lomb. di Sci. Lett. IIL. 4: 438. 1877. 
