Luisier 1 begins an account of the bryology of Madeira, giving a short account of 
the geography and floral zones of the Island, and an extended historical account 
of the progress of the botanical exploration relating to the mosses and hepatics. 
This account contains lists of the species added to the island flora in each suc- 
cessive publication with critical notes upon many of them, and closes with a 
bibliography of 34 titles. A continuation of the series is promised. 
The results of the study of the collection of lichens made by Dr. J. A. Cush- 
man in Jamaica in 1912, have been published by Dr. L. W. Riddle 2 in the Torrey 
Bulletin. The list includes the description of two new species, Buellia rinodino- 
spora and Chiodecton leiostictum, with a plate, a detailed list with notes of those 
species that have not previously been recorded, with four new combinations, and 
a revision of the North American species of Megalospora with keys, ranges, and 
various notes. Five species and six varieties are recognized in the genus, six new 
combinations and one new name being made. 
E. B. C. 
Mr. R. S. Williams has published 3 an important paper on the mosses which 
he collected in the Philippines between October, 1903, and August, 1905, at 
various localities, some of which were at considerable elevations. Altogether 
the list contains 240 species, in 118 genera, and, of these, 27 species and 3 genera 
are described as new. Many of the genera in the list are familiar to bryologists 
of America or western Europe, the new species being embraced in the following 
genera: Dicranella, Rhabdoweisiella, Campylopus, Dicranodontium, Syrrhopodon, 
Hyophila, Macromitrium, Pseudopohlia, Pohlia, Bryum, Garovaglia, Jagerinop- 
sis, Barbella, Neckera, Himantocladium, Clastobryum, Thuidium , Ctenidium, 
Elmeriobryum, Stereodontopsis, Isopterygium , Trichosteleum , Rhaphidostegium , 
Pleuropus, and Oxyrrhynchium. The three new genera are Rhabdoweisiella , 
Pseudopohlia, and Stereodontopsis. The paper is illustrated by forty-three 
good figures, on four plates, and the descriptions of the new species, comprising 
usually two hundred words or more, are commendably complete and intellig- 
ible. O. E. J. 
Hold the Lens on Your Thumb. — H. T. Guessow has recently described 4 
a convenient method of holding the hand-lens while examining minute objects, 
particularly in the field. He uses a narrow flat piece of metal bent into a nearly 
complete circle so that it fits over the thumb around the middle or base of the 
thumb-nail. Put on with the open part of the ring above, the flat part of the 
handle or case of the ordinary folding doublet, Coddington lens, etc., can be 
slipped under the ends of the clip. The lens can be thus held in the left hand 
1 A. Luisier. Les Mousses de Madere. Broteria. 15 : 81-98. map. (Aug. 1917.) 
2 Lincoln W. Riddle. Some Noteworthy Lichens from Jamaica. Bull. Torr. Club. 44 : 321- 
330. pi. 21. (July 1917.) 
3 Williams, R. S. Philippine Mosses. Bull. N. Y. Bot. Gard. 8: 331-378. Pis. 171-174. 
July 10, 1917. (Issued separately in advance, July 23, 1914.) 
4 Guessow, H. T. A Thumb Clip for Use with Magnifiers. Phytopathology 7 : 451-452. 
Dec., 1917. 
