PEEFACE. 



This sixteenth Decade gives an illustration, of the natural colors 

 of life, of the beautiful species of Monitor Lizard, M. Gouldi, 

 from the warmer latitudes of the colony, allied to the large 

 Lace Lizard, or so-called Iguana, Hydrosaurus varnis, figured 

 on our Plate 41, of the districts neai'er the Southern coast. 



The next two plates illustrate two genera {Pygojyus and 

 Debna) of those extraordinary Snake-shaped Lizards without 

 feet, popularly supposed, both by the aborigines and settlers, 

 to be highly poisonous snakes, although perfectly harmless. 



Plate 154 gives a figm-e from the recent specimen, of the 

 natural colors, of the rare gigantic Mackerel, the Cyhium 

 Commersoni, of which only one example has been found on our 

 coast. 



The next plate illustrates another fine species of large, food 

 fish, one of the Pelamyds^ nearly allied to one from Japan, 

 but which I have named Pelamys Schlegeli, to recall that fact, 

 and on account of differences which I have published. 



The next three plates illustrate rare and interesting Polyzoa 

 from our coast, the specimens and descriptions of which Mr. 

 MacGillivray has given for the Museum and this work. 



Plate 159 illustrates the common Sydney Craw-fish, Palinurus 

 Hiic/eli, showing the colors of life for the first time ; one of the 

 rarest Crustacea of our coast. This is replaced in Victoria by the 

 Southern Spiny Lobster or " Common Melbourne Craw-fish," 



