for the year 1867. xi 
who found it, Phocodon (Squalodon) Wilkinsonii (M‘Coy). 
This most singular occurrence of a highly characteristic 
Kuropean miocene tertiary genus of mammal strongly con- 
firms Professor M‘Coy’s previous classification of the similar 
beds of our coast or lower miocene. In these beds he also 
recognizes the teeth of extinct species of fish, identical with 
lower miocene and upper eocene formations in Hurope and 
North America, such as Charcarodon megalodon, Charcaro- 
don angustidens, Oxyrhina Desori, &c. A great number of 
new species of extinct Voluta, Cyprcoea, &c., have been cha- 
racterised by the same writer from these beds during the 
year, and great interest is expressed in the European 
journals at his discovery of two species of Trigonia in the 
tertiary formation at Schnapper Point, Spring Creek, and 
near Geelong. The abundance of species of this genus in 
the mesozoic formations in various parts of the world, its 
occurrence in the recent seas of Australia, but not occurring 
in the intermediate tertiary formation has long been a 
curious geological puzzle, now solved by the discovery of 
the Trigonia acuticostata (M‘Coy), and Trig. semiundulata 
in our miocene tertiary deposits. Both the species are of 
additional interest on account of being distinct from the 
recent forms. 
Beyond the bounds of our colony, however, at the head of 
the Flinders, in the same rocks which Professor M‘Coy 
proved last year to mark the cretaceous period in Australia, 
a still more important discovery has recently been made by 
this gentleman, of bones of the Hnaliosaurian genera, so 
peculiarly mesozoic as to confirm in a marked manner his 
previous determinatians (contrary to the received notion of 
all geologists) of the occurrence of formations of this age in 
Australia. These are a large new species of Ichthyosaurus, 
Ichthyos. Australis (M‘Coy), and two large new species of 
Plesiosaurus, P. macrospondylus (M‘Coy) and P. Sutherlandi 
