40 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 
LitcHFieLp: Salisbury, Mrs. Phelps. Hartrorp: New 
Britain, Shepard. FatrFie.p: Fairfield and Stratford, Eames. 
New Haven: East Haven, J. A. Allen; Milford, Eames; New 
Haven (1875), Eaton; Oxford, Harger. MuIppLEsEx: Clinton, 
Miss Marion Clark. 
New England west to British Columbia and south to 
Mexico; Brazil; Europe; Asia; Australia. 
Rer. Eaton 15, 68. Evans, 28, 170. 
FAMILY MARCHANTIACEZ 
1 Air chambers in several layers, separated from one another 
by plates. of ssteén: Celllses os wuesed sivinmes oo Saw oes ae aS 2 
Air chambers in a single layer, the green cells arranged in 
simple or branched rows arising from the floors of the 
CHAMBERS? 4 alts seks aush Sum aaa denn tinle way wale ocean wane 4 
2. Sporophytes destitute of distinct pseudoperianths........ 3 
Sporophytes each surrounded by a distinct pseudoperianth, 
consisting of a thin membrane divided longitudinally 
Into eight -s€PMEN tS... . eu deste oa eed hed e eS Asterella 
3. Ventral scales of thallus purple, scarcely projecting 
beyond the margin; capsule only partially filling the 
involueral cavity” vdewesciie ss smey dated ar barnes Reboulia 
Ventral scales of thallus soon becoming bleached, extend- 
ing far beyond the margin, and usually forming a dense 
tuft at the apex; capsule completely filling the involucral* 
CONMILY?: 1:4. nS0aecus eee ae, legen eae eee hits eee Grimaldia 
4. Pores in epidermis of thallus simple, each surrounded by 
a: Single. layer Of Cells... craic Awnd daman weeny endless 5 
Pores in epidermis compound or barrel-shaped, each sur- 
rounded by cells arranged in several tiers............ 6 
5. Outlines of air chambers distinct to the naked eye; gemmez 
none; plant mative 2. cic. cces acca eewevee ce Conocephalum 
Outlines of air chambers indistinct to the naked eye; 
gemmz abundant, produced in crescentic receptacles; 
plant introduced into greenhouses.............. Lunularia 
6. Gemmez none; carpocephala with indistinct flat rays Preissia 
Gemme usually abundant, produced in cup-shaped re- 
ceptacles; carpocephala with distinct terete rays Marchantia 
Reboulia Raddi 
Reboulia hemispherica (L.) Raddi. Asterella hemisphe- 
rica Beauv. 
On shaded banks and in crevices of rocks. May and June. 
