NAGELI. 369 
The titles of some of these are cited below.* To the same period 
belongs an algological noe cos interest, that on the Ceramiacea,t 
in which the female organs are first described and figured, though, 
unfortunately, Nageli completly failed to understand their function. 
meantime Nageli was also continuing those researches 
on variable species which he ee apg on rine very outset of 
me career. The long series of p n the genus Hlieracium, 
me of which are cited los, eae ES a aes the close of his 
life i in the work on the Hieraciat of Central Europe, published in 
cus neien with Peter. This systematic work was an sopeihaele 
preparation for the treatment of saga great ihieaes of heredity and 
peolition, ; in the light of Darwin's work. Niageli’s views on the 
whole question were first expr a in an wis ible ges on _— 
8 view is open to the grave Pen . — belongs the 
credit of having first clearly sists the of variabili 
must be internal to the organism. this “igen is is first of a 
whole series dealing with the subjects of Variation, Hybridisation, 
and the Origin of Species. || 
* Verhalter des polarisirten Lichtes gegen se ge a Organization. Miin 
chen, Sitzungsberichte, 1862. Ueber erystalliihnliche Proteincirper, Do., 1862. 
Reaction von Jod auf Stiirkekirner u. Zellmembranen, i 1862 & 3. Ueber die 
chemische Zusammensetzung der Stiirkekirner u. Zellmembranen, Do. Ueber die 
chemische Se goempore a der Stir sige tog a Ueber den inneren Bau 
der vegetabilischen Zellenmembranen, | 1864. See also Nigeli und Schwen- 
dener, Das Microscop, ‘1877, of ae ne ‘a translation into English been 
publiched. 
t Beitriige -~ “ee u. Systematik der Ceramiacee. Miinchen, Sitz- 
maps: hte, 186 
{ Ueber eini. aoe ten der Gattung Hieracium, Zeitschrift fiir wiss. Bot., 1845. 
Ueber die Innovatio S bet den Hieracien — = ~ — ungsberichte, 1866. 
Ueber die Gslieuipieche Behandlung der Hier Uber die Synonomie 
und literatur der Hieracien, Do. Ueber Poslpstsaoacinsy Be De. ., 1867. Ueber die 
Piloselliformia, Do. Die Hieracien Mitteleuropas. Né ‘ge eli u. ee: 1885, &e. 
y other papers bearing on the subjec! 
§ Ueber die Entstehung und Begriff der phi 1 Art. Miinchen, 
Sitzungsberichte, 1865. 
|| Ueber yar Einfluss tiuserer Verhiiltnisse auf die Varietitenbildung im 
a eiche, Mins, Akad. Sitzungsberichte, 1865. " Mees die Bedingungen 
kommens v 
tii : 865. 
im * Phanadievah, Be: 1865. Ueber die abgeleiteten Pflanzenbastarde, Do., 1 
Theorie der Dasseraraaaey, Do., 1866. Ueber die Zwischenformen zwischen 
den Pflanzenarten, 
JOURNAL OF Borany. Nen.. 29. ([Dec. 1891.] 2B 
