Victorian Groptolites. 15 



the heart of what is mapped as (Upper) Silurian country. With 

 regard to the extent of these lower rocks and the nature of their 

 contact with the younger series we have as yet no knowledge, 

 and as the matrix of the Museum specimen of Cardium gipps- 

 landiaim from Matlock is very similar to that of the graptolites 

 before me, great care will have to be exercised in mapping the 

 area. 



The horizon of the present fossils is very close to that indicated 

 by the graptolites wdiich I recently recorded from North-eastern 

 Victoria, and is referable to the upper part of the Ordovician. 



Locality. — Four miles from Matlock, on the Wood's Point 

 Road (E. O. Thiele). 



{b) DiCTYONEMA MACGILLIVRAYI, nom. mut. 



Some years ago I described and figured this species under the 

 name of D. grande^ and two years later Mr. G. B. Pritchard 

 <lescribed the hydrothecje of the same species.'^ According to 

 Bigsby'^ the name had previously been used by Barrande, but 

 Jahn says only in manuscript if used by Barrande at all.^ Since 

 then the name has been applied by Nicholson to a Canadian 

 form.' 



The present species is distinct from Nicholson's, and I propose 

 the name D. )nacgiUii)rayi for it, dedicating it to the late Dr. 

 P. H. Macgillivray, whose labours in our recent and tertiary 

 polyzoa are so well known. 



It is of interest to note that the genus Bryograptiis occurs 

 commonly at Lancefield in association with this species, having 

 been simultaneously recognised by Mr. Pritchard, and myself. 

 The presence of this fossil satisfactorily confirms the relative 

 position I had assigned to the beds, as containing the oldest 

 graptolite fauna we know in Australia, Pi'ofessor Lapworth 

 regarding the genus as Upper Cambrian.'' 



1 Proc. Roy. Soc. Vic, iv. (N.S.), Pt. I., 1892, p. 0. 



2 Proc. Roy. Soc. Vic, vi. (N.S.), p. 28. 



3 Thes. Silur., p. 200. 



J Sitz. d. K.K. Akad. d. Wiss. Wien, Bd. CI., Pleft. vii., Ab. I., p. 042. 

 •5 A.II.N.H., 4, xi., 1873, p. 133. 

 « A.M.X.H., 5, v., ISSO, p. 274. 



