132 - The Official Guide to the 
also of the peculiar grape- shaped ova, will be seen in 
this case. 
A number of British Cirripedia, formerly classed oe 
old authors as “ multivalve molluscs,” but now rightly 
regarded as crustaceans, are also here exhibited. Of 
these will be noticed Lefas anatifera, the common 
‘Goose Barnacle, which lke /fodlcipes spends the 
sedentary period of its existence fixed to floating 
substances and ships’ bottoms in the tropical and — 
temperate seas ; to these the curious species known 
as Go ehonerte aurita is often found attached, as well 
as to the fine Acorn Barnacle, Corvonula diadema, 
which is only found parasitic on the skin of certain 
species of Whales inhabiting the temperate seas of the 
North Atlantic; these and several other species of 
Lalanus will be seen in the case before us. In 
Case Il. 
are a number of Crustaceans, many species of Crabs, 
Lobsters, etc., and specimens of Sevpuda. 
Case Ill. 
contains a collection of Foreign Crustacea; among the 
Crabs will be noticed the giant Cancer gigas from 
Tasmania, and the curious King Crabs (Limulus), 
natives of tropical seas. 
Case IV. 
is devoted to a collection of Star fishes, of which there 
are some remarkable specimens ; and the three small 
wall cases. contain (1) a number of exotic sponges, 
among which are beautiful specimens of Auplectella 
aspergillum, and the glass-rope sponge //yalonema 
mirabilis ; (2) and (3) a number of fine Corals, etc., 
from the tropical seas. | 
