OCCURRENCE OF GASTRIVCERAS AT IRWIN RIVER COALFIELD, Bip h 
a Us a 
. ‘4 / 
Figs. 2 and 3. Suture lines of Gastrioceras Jacksoni. 

Fig. 4. Portion of fifth whorl of Gastrioceras Jacksoni showing 
the sphonal collars. 
[Collected by Dr. W. G. W oolnough |. 
duction of Dr. Haniel’s delineation of the suture line of his 
Paralegoceras sundaicum. At Letti the Paralegoceras is 
stated to be associated with Agathiceras sundaicum related 
to A. Suessi from the Sosio limestone of Sicily and A. ural- 
icum, Karpinsky, in the Artinsk formation, as well as A. 
cisconense, Smith, from the upper coal measures of Texas. 
It may be added that A. micromphalum is not uncommon 
both in the Upper and Lower Marine beds of the Hunter 
and Illawarra coal fields, being specially abundant in the 
‘Lower Marine series. 
