210 THE ZOOLOGIST. 
(as stated elsewhere) I have kept specimens of Leander inter- 
medius, an allied form, for a week in the same bottle. At present 
the only way I can account for it, is, that the light, coming as it 
does through the sides of the bottle, is too strong for them, or 
that they require a constant stream of water. It could not be a 
question of difference of pressure, as they are procured in shallow 
water. ‘Though darting away at the slightest movement, a person 
may attract them by keeping his hand in the water for some time, 
when they will presently be seen issuing in numbers from all the 
cracks and crannies, though before not one was visible. » They 
must be attracted by their sense of smell, as I have often seen 
them advancing steadily towards my hand’ when there was no 
possible chance of them seeing it. A good deal of reconnoitring 
is done before they make up their minds to come close, and then — 
the smallest specimens always come first. Altogether this species 
forms one of the most interesting and amusing of the Crustacea. 
Port Jackson; New Zealand; Chilé. 
38. Alpheus Hdwardsw (White).—These crustaceans are rather 
common in Port Jackson, and are familiarly known as “ Nippers.” 
‘They may be caught in tiny rock-pools under stones at low tide, 
and are also procured in nets, in company with Peneus esculentus. 
They are very remarkable for their habit of making a sharp 
clicking noise with the large chela when caught or irritated. The 
sound resembles that made by cocking a pistol very quickly, and, 
if the animals happen to be in a bottle, you really have to look 
every now and again to make sure that it is not being cracked to 
pieces, so sharp is the sound. Colour, light green on carapace, 
and traces of red on abdominal somites. 
89. Leander intermedius (Stimp.).— Common all along our 
coast in small rock-pools (left by the tide as it recedes), in which, ~ 
if disturbed, they seek the shelter of any small stones which are 
lying about. They are very hardy, as I have well proved. I kept 
a few of them alive in a bottleful of sea-water for a week without 
once changing it, while some specimens of Rhynchocinetes typus 
which were put in at the same time died within three or four 
hours. This difference, which I have noticed repeatedly, is hard 
to account for. The integument is translucent, and covered with 
small red spots, which are noticeable even upon the embryo 
within the ovum. 
