96 ‘General Notes. 
spaces. He described the strengthening cell system and the resin- 
ducts. The fibro vascular bundle in the centre of the leaf showed 
traces of its formation by the coalescence from two primitive bundles; 
whether these remained distinct at the tip the author could not say. 
There are eight stomata in each leaf, six above and two below. 
John M. Coulter described the peculiar structure of the “Stornata 
of Tillandia usneoides.” The scales which give the Spanish moss its 
pubiscent appearance are to be regarded as leaves since each bears 
a stoma. Surrounding each stoma is a trichoner structure, in the 
centre of which are four sensitive cells. Below these comes the 
true stoma with its two sensitive guard cells. Experiments with 
the plants showed that this peculiar structure was to be explained 
by the epiphytic habits of Tillandia and the trichonu structure 
must be regarded asa reservoir of moisture. Walter H. Evans, in 
-an account of the “Lichens of Indiana,” gave an account of the 
habits and structure of Lichens and the methods of collecting these 
plants. He stated that he had already recognized seventy-six 
species of Lichens in the state, distributed among twenty-eight genera. 
J.C. Arthur detailed his investigations on the “ Life History of 
the Plum-leaf Fungus.” He found that the summer spores cannot 
withstand the winter but that soon after the leaves fall to the 
ground there is a new formation of minute winter spores, the sub- 
sequent history of which he had not found out but which he was 
inclined to regard as male sex spores. No other spores were form 
in winter but in spring the fungus took on a new development — 
with the formation of ascospores which ripened in June. From 
these the leaves were infected and a new growth of the fungus 
took place. a 
The last paper was “Man an Evolution—Biological proofs,” by 
T. B. Ridding. The author accepted the principle of evolution — 
but claimed that there must be successive additions of Divine — 
power in order to account for the existing fauna and flora and for 
the appearance of man. d 
Committees were appointed looking towards the purchase, of | 
scientific works by the State Library and to invite the American 
Association for the Advancement of Science to hold a meeting % 
Indianapolis in 1889. It was voted to hold the spring meeting of 1 
the Academy May 9, 1888, at Wyandotte Cave. The followmg 
of Greencastle. It was voted that the past presidents of the 
Academy be added to the executive committee. - 
