Tue ZooLtocist—Aveust, 1876. 5035 
of this species in both works are very poor, Yarrell having 
copied the original drawing, as he avows, through the kindness 
of Mr. Couch. This drawing was taken from a dead specimen, 
as indeed seems to be the case throughout Couch’s work: 
certainly many of the figures represent the colours of dead fish, 
and give no idea of living examples of the species represented. 
The Murry is a much handsomer fish than the figure suggests, both 
in symmetry and colour. At present these are the only live speci- 
mens exhibited in Britain. I ought to add that one other—brought 
in the same manner by the same gentleman eighteen months ago— 
is in good condition, having grown much, in a tank in the same 
aquarium. In this consignment is also a fine Callappa crab 
and a most lovely specimen of Anthea cereus: if the latter is a 
type of the Mediterranean sea-anemones, they must indeed be 
beautiful. 
Recently the literature of Aquaria has been greatly added to. In 
the ‘ Field’ there has been a somewhat lively correspondence upon 
the rival systems,—that of Brighton, which consists of changing 
the water at frequent intervals, and the system of the Crystal 
Palace Aquarium, where the water is never changed, but simply 
circulated through the tanks from a large cool and dark reservoir 
containing several times more water than that exhibited. By this 
system the water is thoroughly aérated and the temperature is kept 
even. In this correspondence in the ‘Field’ the arguments in 
favour of the Brighton Aquarium system have been answered and 
exploded. 
But by far the most valuable contribution is that of Mr. W. 
Alford Lloyd, which appeared in the July number of the ‘ Popular 
Science Review,’ entitled “Aquaria; their Present, Past and 
Future.” In this exhaustive article Mr. Lloyd, in his usual happy 
style,—commencing with a story of how, eighty-six years ago, the 
late Sir John Graham Dalyell used to supply his aquarium (then 
without a name) with water,—goes carefully through the somewhat 
complicated history of the rise and progress of aquaria. Then, so 
differently to some others, who seem only to look upon aquaria as 
a means of raising money, he shows why his system is such a great 
success, by a careful and masterly explanation of the bearing of 
physics, chemistry and engineering upon the question. I make no 
apology to my readers for quoting the following extracts from his 
paper: — 
