Geini..s l/nilJiiii in Vifforta. 397 



of the Miin-;iy, near its junction with the Darling, but those who 

 know this locality have very grave doubts about its correctness. 

 Then, again, Corio Bay is given as a locality, but the specimen 

 ))reserved in the National Museum is certainly not in Corio Bay 

 matrix, and it seems probable that the locality should have been 

 Batesford. 



Professor Tate^ in his treatment of our echinoids only repeats 

 McCoy's original localities, and nothing is added to our knowledge 

 l\y Dennant and Kitson's Catalogue,'- while the latest is a very 

 doubtful record on fragmentary remains of a very large echinoid 

 from near the junction of the Grange Burn and Muddy Creek? 

 Western Victoria, by Mr. F. Cliapman.'^ 



Having regard to the characters of this echinoid, there seems 

 very little doubt but that McCoy's species is better placed in the 

 genus Linthia, and McCoy himself was not absolute in placing it 

 as a Pericosmus, for he states : " I refer the fossil provisionally 

 to I'ericonmus as an aberrant species." Tlie imperfeet remains 

 recorded by Mr. Chapman from our Western District are referred 

 to as in'obably LijifJiia gigas. 



In transferring this large species of echinoid to the genus 

 Linthia, the possibility of the foregoing new sjjecies herein 

 described, being only a form of L. (/if/as, has not been lost sight 

 of. especially when one finds such enormous variability in all 

 our echinoid species, which can be collected in large numbers. 

 Still the characters in the specimens hitherto obtained of the new 

 species appear to run along sufficiently divergent lines to war- 

 rant a distinctive name. 



Linthia yigas may be characterised by being a very large con- 

 vexly rounded species with strongly swollen ambitus, very widely 

 divergent anterior-lateral petals, which are distinctly sigmoidal, 

 in general shape somewhat ovate, and nearly half as high as 

 long. 



TIT. — Linthia antiaustralis, Tate. 



1SS5. Linthia antiaustralis, Tate. Southern Science 

 Record, vol. i., n.s., No. 1, January, pp. 4, 5. 



1 Trans. Koy. Soc. S.A., 1891, vol. xiv., pt. ii., p. 277. 



2 Rec. Geo. Surv. Vic, vol. i., pt. ii., p. 131. 



3 Proc. Uo.v. Soc. Vic, 1908, vol. xx., n.s., pt. ii., p. 217. 



