— 34 — 
and criticized, while the author’s own observations form no small part of the 
twenty pages and, with constant references to figures, present a most valuable 
contribution.. 
The following citation of a paragraph from these Notes shows just which 
characters seem most trustworthy and which are used to form the framework: 
“In the present paper the morphology of Marchantia will be treated largely 
from the standpoint of the taxonomist. In other words the parts of the plant 
which yield the most distinct and constant specific characters will be primarily 
considered. These parts include the epidermis and the epidermal pores, the 
compact ventral tissue, the ventral scales, the rhizoids, the receptacles, and the 
cupules. The photosynthetic layer, the sexual organs, and the sporophyte, 
although yielding important generic characters, are less helpful when the in- 
dividual species are considered. For the sake of completeness, however, a 
brief account of the sporophyte will be included.’’ 2 
Part III, Description of Species. After a full and most helpful key, come 
the descriptions, followed in most instances by the long lists of specimens exam- 
ined from different localities in North and South America, also an up-to-date 
synonymy and many critical and valuable notes. The figures illustrating the 
species are most concrete, the fragile scales and appendages, anatomical details, 
etc., showing the most delicate and skilful handling of the needles. 
The amount of work involved in the preparation of this paper can be some- 
what appreciated by running through the list of herbaria examined: those of 
the New York Botanical Garden, including the Mitten and Underwood herbaria; 
Harvard University, including those of Taylor and Sullivant; the United States 
National Herbarium; and Yale University, including those of Eaton and the 
author’s private herbarium; several specimens from the Montagne and Boissier 
herbaria, including a number of types; and the private herbarium of C. C. Haynes. 
The new species is M. breviloba Evans and it has been several times collected 
in the island of Jamaica. 
The whole list of species is as follows: 
Section I. Astromarchantia 
Marchantia polymorpha L. 
M. Berteroana Lehm. & Lindenb. 
Section II. 
M. paleacea Bertol. 
M. breviloba Evans 
M. domingensis Lehm. & Lindenb. 
M. plicata Nees & Mont. 
Chlamidium 
M. papillata Raddi 
M. Bescherellei Steph. 
M. chenopoda L. 
The three species that are known in the United States are M. polymorpha , 
M. paleacea (Arizona), and M. domingensis , which replaces one of the synonyms, 
M. disjuncta Sulliv., by which name we have so long known it. 
Caroline Coventry Haynes 
Highlands, New Jersey. 
2 op. cit., page 209. 
