— 31 — 



under Nowellia; Odontoschisma elongatum is a variety of 0. denudatum; Caly- 

 pogeia fissa, suecica, and sphagnicola are retained as varieties of C. trichomanis; 

 Bazzania trilobata and Pearsoni are placed under Pleurochisma, and Porella 

 laevigata, platyphylla, and rivularis under Madotheca. Bazzania trier enata is 

 listed as a synonym of Pleurochisma triangular e (Schleich.) Loeske, and Porella 

 pinnata is under Madotheca porella. Lejeunea cavifoUa is treated under Eule- 

 jeunea. Schiffner is followed in regarding Huebener's Jungermannia catenulata 

 {Cephalozia catenulata Spruce) as not different from Cephalozia reclusa (Tayl.) 

 Dum. 



In citations it is to be noted that DeNotar is uniformly given for DeNotaris, 

 and D. C. is used for DeCandolle. 



Altogether there are described, or at least critically discussed, 329 species, 

 quite a large proportion of which also occur in North America. Both as to figures 

 and descriptions this manual should prove useful as a reference book even for 

 the hepatics of the United States. O. E. Jennings 



Carnegie Museum, Pittsburgh, Pa. 



MISCELLANEOUS NOTES 



Course on Bryophytes offered at Michigan Biological Station. — 



Dr. George E. Nichols writes that last summer he conducted a course at the 

 University of Michigan Biological Station on the Taxonomy of the Bryophytes 

 and expects to give the course again this coming summer. The Station is lo- 

 cated on a tract of 3200 acres of land owned by the University of Michigan and 

 is located between Douglas and Burt Lakes about 17 miles south of the Straits 

 of Mackinac. Despite unfavorable first impressions, Dr. Nichols found the 

 region bryologically quite rich. Not all collections are yet identified but, up to 

 date of writing, he had named 56 liverworts, 15 sphagnums (plus several vari- 

 eties), and 130 mosses. These specimens include about 90 species not before 

 recorded from Michigan. O. E. J. 



Fossombronia cristula, Life History of. Arthur W. Haupt. Bot. Gaz. 

 69: 318-331. 4 pis. April, 1920. The vegetative body is a minute creeping 

 branched thallus with two dorsal rows of genuine leaves. Monoecious, with 

 sex organs in the axils of leaves, and antheridia and archegonia may occur in 

 the same axil. In the archegonium the cover cell is inactive; 6-8 neck canal 

 cells are formed; and the venter is two cells thick before fertilization. The 

 calyptra becomes 3-4 cells thick. The sporophyte is primitive; the sporogenous 

 tissue is differentiated early; and the elaters are rudimentary, each being homolo- 

 gous with a single mother-cell and not with a row of them. The mature capsule 

 is globular or nearly so and its wall is invariably two cells thick and bears rudi- 

 mentary annular and half-ring fibers on the cell-walls of the inner layer. The 

 material studied was found by the author in cracks on fine wet deposits of silt 

 on the bottom of an almost extinct lake in the Dune Park region in northern 

 Indiana. O. E. J. 



