312 MR. GEO. MOSLEY ON DAPHNIA PULEX. 
with the laws of development of other Branchiopoda, that 
it may be an eye in the embryonic state. It is evidently of 
great importance to the animal; and with all due deference 
to these distinguished authors (the suggestion is made 
with diffidence) may it not possibly be the organ of smell? 
Schédler’s supposition that it is the ear, and Miiller’s that 
it is another eye, do not bear the impress of probability ; 
whereas in most animals the sense of smell is situated be- 
tween the eye and the mouth. Zenker confesses that an 
eye in the embryo could be of but little use; whereas a 
highly developed olfactory might be so, Again: immedi- 
ately behind the eye may be observed several round spots 
each about ;,)5 of an inch in diameter, from which a 
branched nerve extends across the nerves and muscles of 
the eye to the front of the larger lobe of the brain. These 
do not appear to have been noticed by any of the said 
writers; their use is unknown; but from their position in 
the head, and their connection with the brain, it is not 
unreasonable to suppose that they may form the true 
auditory organs. If these suggestions be correct, the 
organs of hearing and smelling will be placed behind and 
in front of the eye, in accordance with the laws which 
prevail in comparative anatomy.” 
After describing the male Daphnia, which Mr. Mosley 
says is not often to be met with, he concluded this paper 
by a lengthy description of the singular method of the 
reproduction of the animalcule. 
