[Pkoc. Roy. Soc. Victoria, 21 (N.S.), Pt. I., 1908]. 



Art. XIV. — On the Occurrence of the Genus Linthia 

 in Victoria, with description of (t new species. 



By G. B. PRITCHART), B.Sc. F.G.S., 



Lecturer on Greology &c., Workin<i; Men's College, Melbourne. 



(With Plates XXII., XXIII.). 



[Read 11th July, 1908]. 



For several years the occurrence of a gigantic species of 

 echinoderm in the Batesford Limestone, Geelong, has been 

 known to me by abundant fragments and imperfect portions 

 of a very hirge test. In 1890 I obtained an entire but very 

 badly crushed example, Avhich, together with the previously 

 obtained fragments, was then regarded as Pericosmus c/igas, 

 McCoy, and was recorded as such from the above locality, in a 

 paper on the Geology of the Southern Portion of the Moorabool 

 Valley.i 



This record should now be expunged, for move recently I 

 obtained the largest and most perfect example I have yet seen, 

 and careful examination of this shows it to belong undoubtedly 

 to the genus Linthia, and not to Periro'^muf. The late Sir F. 

 McCoy records^ Pericosmus gif/as from Corio Bay, Geelong, but 

 the specimen as preserved in the National Museum, Melbourne, 

 being very imperfect and badly broken, shows a good deal of 

 the matrix, and unfortunately no such matrix is known to occur 

 at Corio Bay. 



It is possible that this specimen may have come from the 

 Batesford Quarries, and if such should have been the case, it is 

 likely that Pericosmus gigas, as well as the large new species 

 of Linthia hei'ein described, may have existed in the same 

 locality. 



1 Prop. Hoy. Soe. Vic, vol. iv., n.s., ]it. i., p. 18. 



2 I'l'od. I'al. Vic, dec vii., p. If), i>ls. 04, tiii. 



