68 



IJIihllAllNG TROUT l-Kl J> lai. > \I,T\\ .\lh,K l:l\hn. 



(From a photoriraph supplied by Mr. J. Scott, Bourkeslreet. ) 



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KNOLISH TROl'T OAIKJUT IN THE YARRA BY MK. T. ANDERSON, IOtH DeC. , 180;>. 



Weight, 131l>. I5oz.; length, 35 inches; girth, 17 inches. 



MOLLUSCA. 



The terra molli\sca, i.e., soft-botlied animals, is applied to snails, slugs, polyps, bivalves, 

 and their allies, because they have no skeleton which enters into the mechanism of their 

 movements ; neither an internal one like that of the vertebrates, nor an external one like tliat of 

 many of the Crustacea. Most moUnsca are provided with a shell, and luive a liead very distinctly 

 marked off from tlie body, and bearing eyes and tentacles. 



Cephalopoda or liead-footed, to wliicli all the octopus and squid fiimily behing; Gasteropoda 

 or belly-footed, siicli as the ^whelk, periwinkle, limpet ; Conckifera, shell-bearing, such as the 

 oyster, mussel, clam. 



