ON THE ANASPIDACEA, LIVING AND FOSSIL. 549 
theca. The spermatozoa pass into the spermatheca and the 
spermatophores drop off. Fertilisation appears to take place 
in the oviducts, since in some sections of Koonunga shown 
to me by Mr. Sayce, spermatozoa could be seen lying in the 
basal part of the oviducts. As to how the spermatozoa reach 
the oviducal openings from the spermatheca there is some 
doubt, but it seems probable that they are assisted in this 
migration by the peculiar setose lobes on the internal faces 
of the last three pairs of thoracic appendages, which are 
only present in the female. 
The female deposits and hides the fertilised eggs, which 
are of a purple colour and measure about 2 mm. in diameter, 
singly and not agglutinated together, under stones and 
among the roots of water plants (Pl. 12, fig.3). This peculiar 
habit of oviposition is only found elsewhere among the 
Malacostraca in certain forms of Kuphausiide which may 
have pelagic eggs; in all other Malacostraca they are either 
carried in a brood-pouch (Phyllocarida and Peracarida), or else 
glued on to the abdominal limbs (Kucarida), or carried in a 
special chamber formed by the maxillipedes (Hiplocarida). 
Among Entomostraca the only forms which deposit their eggs 
are the Argulide. 
As to the development of the eggs or the presence of any 
larval stages my observations are unfortunately very few. I 
am, however, convinced that no complicated metamorphosis 
is passed through, as the pools under my observation were 
continually being replenished by minute Anaspides of 
4—5 mm. in length, which already possessed the complete 
adult structure. It is also quite impossible that pelagic 
larvee of such types as the Nauplius and Zoza could be 
assumed, as they would at once be swept away in the 
mountain torrents down to the lowlands, where Anaspides, 
as a matter of fact, never occurs. It is possible, however, 
that the young are hatched out from the egg, not with the 
complete adult structure, for Mr. Sayce (10) found a minute 
specimen of Koonunga in which the abdominal appendages 
were incompletely developed. 
