208 THE ZOOLOGIST. 
rock-pools. In choosing its domicile it seems to have a decided 
partiality for the shell of Purpura succincta. It may often be 
found in the act of house-hunting, though in general choosing a 
shell a few sizes too large, so that there is no need to make a 
change until several ecdyses, or moults, have taken place. Port 
Jackson, Bondi, New South Wales. 
29. Paguristes barbatus (Hell.).—Another of the ‘‘ Hermits” ; 
not so common nor so large as the preceding. I have found it 
inhabiting the shells of Purpura succincta, Monodon zebra, and 
Neritina punctata. Port Jackson. 
30. Porcellana dispar (Stimp.).—This species frequents stones 
covered with mud and alge that are found just below low-tide 
mark. If one of the stones be picked up out of the water these 
crustaceans will not, at first, be observed, as they appear precisely 
similar to dirty little pieces of seaweed or mud as they slide down 
towards the water. Very common round the shores of Port 
Jackson. The carapace is about three-sixteenths of an inch 
in width. 
Tribe THALASSINIDEA. 
31. Callianassa sp. ?—-Inhabits the same localities as Mycteris 
longicarpus, but burrows deeper, and subsists on mud-worms. 
Though it is classed amongst the Podophthalmatous Crustacea, 
its eyes, which are reduced to mere dots, are sessile. This is not 
to be wondered at, inasmuch as it has very little need for eye- 
sight, spending as it does most-of its time burrowing, and but 
rarely coming to the surface. In colour it is of a yellowish pink, 
as a rule, but is sometimes white. Port Jackson; not very com- 
mon. Length, 23 in. from rostrum to telson; large cheliped, 
13 in. long. : 
Tribe ScyLLARIDEA. 
32. Ibacus Peronit (Leach).—The members of this species 
pass most of their time on a muddy bottom, in not very shallow 
water. They are of a beautiful salmon-colour. Length, 9 in. 
Rare. Port Jackson. 
33. Palinurus Hiugelii (Hell.).—Closely allied to the British 
Rock Lobster (P. vulgaris). It is the common Sydney Crawfish, 
and sometimes grows to the length of 24 in. Subsists on a 
vegetarian diet, viz. fibrous marine plants. Rocky coasts of New 
South Wales. 
