JUN 14 1906 
The Ohio T^aturalist, 
PUBLISHED BY 
The Biological Club of ihe Ohio Stale University. 
Volume VI. JUNE, 1906. No. 8 
TABLE OF CONTENTS 
^^CHAFF^■ER— Terminology of Organs in Various Conditions of Development 541 
jENNiN(iS—.ldditious to the Flora of Cedar Point. II 544 
.lACKSON— Key to the Families and Genera of the Order Thysauura 545 
Hine— X otes on Some Ohio Mammals 550 
Young— Key to the Ohio Viburnums in the Winter Condition 551 
Berger — A Simide Formula for Mixing any Grade of Alcohol Desired 652 
Hine— The Purple Gallinnle in Ohio .553 
Griggs— A Diurnal Rotation in Leaves of Marsilea 554 
Metcai.f— Meeting of the Biological Club 656 
luilex to Volumes IV. V and VI. 
TERMINOLOGY OF ORGANS IN VARIOUS CONDITIONS 
OF DEVELOPMENT. 
John H. Schaffner. 
In describing organs which are undeveloped, defective, or re- 
duced, one is sometimes at a loss as to the proper term to be ap- 
plied. The words available are used in various ways bv different 
authors. It becomes necessary, therefore, for each individual 
to make some selection for himself in order to avoid general con- 
fusion until a common agreement is reached either through gen- 
eral consent or through some authoritative body. Without go- 
ing into details on special cases, one may consider the following 
types of organs representing various stages of individual develop- 
ment or of evolutionary progress. 
1. Normal organs in the first stages of development in the 
individual are “incipient” organs and the beginning of such an 
organ is its “inception.” The wuiter has proposed the term 
“incept” as a suitable noun to be used in the same way as the 
German “ anlage. ” Thus one may say that a bud is an incipient 
flower, or the bud is the incept of the flower. An incipient organ 
is one in the embryonic condition but not necessarily an organ 
of the embryo. Primordium and rudiment have been used as 
special nouns for incipient organs but rudimentarv is a general 
term and primordial from its paleontological flavor has rather a 
phylogenetic meaning. 
Definition — Incipient organ, incept (Lat. inceptio,incipiens) — 
An organ in its first stages of development in the life of the indi- 
vidual; an organ in its embryonic condition. 
2. Organs in the first stages of their evolution or such as 
have become specialized or fixed in a certain stage of evolution, 
while in related groups they have advanced to higher types, are 
library 
NEW YORK 
botanical 
Garden. 
