76 BOTANICAL GAZETTE. [ April, 
Charles Wright; a portion of this collection was issued in 1864 
under the title “Caroli Wrightii Lichenes Cubs curante E. 
Tuckerman.” The other portion was sent to Dr. Nylander, of 
Paris, for determination, in whose hands it remained for many 
years, when transferred to Dr. J. Miiller, of Geneva, Switz- 
erland, by she it was issued in 1884, but with most of the plants 
still unnamed and undescribed, much to the disappointment Be 
those who had purchased this noble collection hoping to find i 
an aid in the determination of tropical lichens. The bint 
ations of the Pyrenocarpe were, however, published by Dr. Miil- 
ler in 1885, and that of the Graphidex may perhaps be expected 
before long. 
The “ Lichens of the Wilkes’ Exploring Expedition,” pub- 
lished in 1861, were described by Se Recaps, illustrated 
with admirable drawings by Mr. Sprag 
The “ Lichens of ate, Geoler. and the Rocky moun- 
tains,” pp. 35, Amherst, 1866, f vreshadowed the systematic views 
which the author had iat ‘ol sok he was preparing to de- 
velop in his subsequent work, the Gen 
The “Lichens of the Hawaiian fis ” collected by Horace 
Mann was published in the Proceedings of the Am. Acad. vil. 
223-234 (18 
The“ Geological and Natural History survey of North Caro- 
lina” by Rey. M. A. Curtis, oi 1867, contained a list of 
lichens of which it was said that it had been arranged by Prof. 
Tuckerman. But he refused to sipenstodge it as it had been 
made up from an old list with changes and additions which he 
had not been permitted to see. 
In 1872 appeared the result of over thirty years’ study, obser- 
vation und refiection, the “ Genera Lichenum ” pp. xv. 281, Am- 
herst. Always adhering to these systematic views, he adapted to 
them the changes rendered necessary by the growth of knowledge 
while maintaining their main features. The main features of this 
work are the comprehensiveness of its views, its ample discussion, 
derived from a wide range of knowledge, and almost requiring 
an equal knowledge duly to estimate them, its comprehensiveness 
in regard to the limitation of species, and its rejection of the 
chemical tests by which species have been indefinitely multiplied 
in Europe. is views have met with scant recognition there 
where it has become the custom, as he once wrote, to. consider ev- 
ery marked variety as a species and every marked species as a 
genus; but if lichens survive the onslaughts now making on 
them by those who deny their autonomic existence, the philo- 
sophical views of Tuckerman must at length prevail, and they 
