124 REPORT OF THE CONFERENCE ON GENETICS. 
The others may be regarded respectively as absence and presence of sap 
areas, and absence and presence of green plastids, presence being apparently 
recessive, 
Many other characters in orchids, both pigmental and structural, are 
obviously Mendelian, but more evidence and_much careful investigation 
ORCHIDS. 
dl. 
Hera showing segregation of spotted and striped sap patterns. 
Fia. 
Forms of Paphiopedilum x 
are necessary before one can venture to deal confidently with such com- 
plicated material. 
RABBITS. 
In my experiments with rabbits, fourteen pairs of Mendelian characters 
have so far been found, which may be classified as follows, the first-named 
of the pair being dominant over the other, which is recessive : 
