78 SCIENCE 
4 to 6 microns wide. The spores are oblong, 
somewhat pointed at both ends, 6 to 8 microns 
long and 2 to 38 microns wide. The paraphyses 
which are very numerous and which vary 
somewhat from filiform to clavate, are 40 to 
60 microns long and 1 to 3 microns wide. 
TABLE GIVING THE COMPARATIVE MEASUREMENTS 
OF THE PEACH AND APPLE SCLEROTINIAS 
Asci Asco. Para- |Apothe-| Stipe 
spores | physes cia | 
Peach 89.3-10.267| 6.2-9.3u 3-5 cm. 
by by long 
5.9-6.8 4 3.1-4.6u 
Apple (De- 44-64. 6-8. 40-60” |1-4mm./ 1-5¢m. 
marree) by by by across | long 
6-8 2-3 1-3 
Apele 120-1804 11-12.5 | 175-180u | 1 mm. |.5-15cm. 
(Aderhold) by by by across'| long 
9-12 5 6-6.84 2-5 
The above table shows very plainly the dis- 
similarity of the forms found by Aderhold 
and those found here. In every respect the 
different parts of the Sclerotinia are smaller 
than those described by the German investi- 
gator. 
It is to be regretted that I was unable to 
produce any growth from the ascospores, 
though they were tried in various cultures, 
including fruit and cooked apples; therefore 
there is no proof of any connection with a 
conidial form of Sclerotinia. But it seems 
evident that this is a new Sclerotinia, al- 
though it may be, and it is my supposition 
that it is, the perfect form of the fungus caus- 
ing the brown rot of apples in this country. 
It may, however, be the perfect stage of 
Monilia uredoformis Ellis & Everhart? which 
has been reported as growing upon apples. If 
so Monilia uredoformis Ell. & Ever. would be 
referred to Sclerotinia as Sclerotinia uredo- 
formis, although it is very obvious that this 
can not be done until Monilia spores can be 
produced from the new form. The investiga- 
tion of this Sclerotinia will be continued and 
I hope to be able to report something more 
definite later. 
J. B. DEMAREE 
MARYLAND AGRICULTURAL COLLEGE, 
COLLEGE PARK, MARYLAND 
> Proceed, Acad. N. Sc. Phil., 1893, p. 461. 
[N. 8S. Vou. XXXV. No. 889 
THE AMERICAN SOCIETY OF 
NATURALISTS 
THE twenty-ninth annual meeting of the Amer- 
ican Society of Naturalists was held in Guyot 
Hall of Princeton University on December 28. 
The eastern and central branches of the Amer- 
ican Society of Zoologists so arranged their pro- 
gram that members were enabled to attend the 
Naturalists’ meeting. Many members of the 
Association of Anatomists, which also met at 
Princeton, attended the program. Although the 
Botanical Society met elsewhere, a number of 
botanists were present. It may fairly be said, 
judging from the attendance of the sessions, that 
the Naturalists’ Symposium was the central fea- 
ture of the entire Princeton meetings. 
The Anatomists, Zoologists and Naturalists had 
a joint smoker at the Princeton Inn on Wednesday 
evening. 
The Naturalists’ dinner was given on Thursday 
evening at the Princeton Inn. More than one 
hundred persons were present, this being the 
largest attendance for a number of years. After 
the dinner the president, Professor H. S. Jennings, 
delivered his address on ‘‘ Heredity and Person- 
ality.’’ This splendid address was most enthusi- 
astically received and has been published in the 
December 29th number of SCIENCE. 
The scientific program of the meeting was given 
on Thursday, both forenoon and afternoon. 
The forenoon meeting was devoted to a discus- 
sion of ‘‘The Relation of the Experimental Study 
of Genetics to the Problems of Evolution.’’ The 
following papers were presented: 
BE. G. Conklin (Princeton University): The 
Problems of Evolution and the Ways they may be 
best Attacked. 
C. B. Davenport (Carnegie Institution): Light 
thrown by the Experimental Study of Heredity 
upon the Factors and Methods of Evolution. 
W. Johannsen (University of Copenhagen) : 
Modern Exact Genetics in relation to the Problems 
of Evolution. 
H. F. Osborn (American Museum of Natural 
History): Unit Characters, Continuity and Discon- 
tinuity, as observed by the Paleontologist. 
H. L. Clark (Museum of Comparative Zoology, 
Harvard University): Pure Lines and Phylogeny. 
At the afternoon session papers on Genetics 
were read as follows: 
B. M. Davis (University of Pennsylvania): 
Further Hybrids of Mnothera biennis and O. 
