THE 



OCT I mo 



GEOLOGICAL MAGAZINE. 



NEW SERIES. DECADE IV. VOL. VI. 



No. v.— MAY, 1899. 



Oiai(3-II5r.A.L JLISTIOXiES. 



I. — Note on a New Australian Pterygotus. 

 By Professor Sir Frederick McCoy, K.C.M.G., M.A., D.Sc. (Cantab), F.R.S. 



I AM greatly indebted to Mr. F. Spry for bringing to my knowledge 

 some extremely interesting Upper Silurian fossils collected by 

 him with great care and diligence from the tunnels excavated 

 through the rocks underlying Melbourne during the progress of 

 the new great drainage works for the city, carried out by the 

 Metropolitan Board of Works. The age of the strata containing 

 these fossils was originally determined by me for Selwyn's Geological 

 Survey Maps of Victoria. 



Four of these fossils belong to genera hitherto unknown in the 

 Victorian rocks, and belong to groups of special interest. I subjoin 

 preliminary descriptions of one of these, that credit may be secured. 

 to Mr. Spry for his scientific zeal in doing such good service to 

 geology while carrying out his professional duties. 



Pterygotus AustraUs (McCoy). Upper Silurian : Melbourne. 

 This is represented by about half of a somatic segment of a species 

 most nearly resembling the Pterygotus hilobus (Salter) of the black 

 flaggy uppermost Silurian rock of Lesmahago, which the matrix of 

 this specimen, from the main sewer tunnel in Domain Road, South 

 Yarra, almost exactly resembles. The anterior margin is slightly 



DECADE IV. VOL. VI. NO. V. 13 



