Intelligent Selection. 145 
were exactly alike in the sexes with the exception that the male had 
eyes of cherry red, while those of the female were yellow—and 
this uniformly so through six or eight pairs proeured. We shall 
take means for a more thorough study of the mammals of the island 
than was possible during our snort stay. We have come on to the 
port of Zamboanga, in the island of Mindanao, and purpose to make 
a collection of the same character here. 
INTELLIGENT SELECTION. 
BY CHARLES MORRIS. 
wat do not distinct species of animals and plants appear as a 
consequence of man’s selection and preservation of varieties ? 
This is a question which has been asked more often than it has been 
answered, and which yet remains to some extent an open query. 
Among domesticated animals—dogs, pigeons, and a few other species 
in particular—the varieties produced by selection have been very 
numerous and well marked, yet they still remain dogs, pigeons, etc., 
and there is no generally accepted evidence that a new species has 
ever been produced by this method.! 
Yet though much has been said on this question, it is by no 
means exhausted. There is one important circumstance which does 
not appear to have been considered, and which therefore gives war- 
rant for a further review of the subject. It is not sufficiently borne 
in mind that the production of, and experiments on, varieties of 
animals and plants has been left almost entirely in the hands of 
ordinary industry. Science has come in to examine the results, yet 
has had little to do with the experiments. These have been gov- 
erned almost solely by pecuniary considerations; yet it must be ad- 
mitted that what may be admirably calculated to make money may 
be valueless to science, and that had a long series of experiments 
been conducted for scientific purposes alone, the results must have 
z It is necessary to state, however, that many scientists hold that new 
Species, and even genera, have been produced in domesticated animals. 
The carrier pigeon, for instance, is looked upon as a well-marked and 
persistent species, while variations in the dentition of dogs, of generic 
value, have been observed. Changes of this character are of the kind 
which it is important for scientific observers to endeavor to hereditarily 
transmit, and render permanent. 
