Royal Geological Society of Ireland. 133 



the limitation of the "Carboniferous or Prodnctus Limestone" to the 

 west of the Range : a formation also remarkable for its having afforded 

 the earliest known Ammonite and the peculiar Brachiopoda Lyttonia 

 and Oldhamini (Waagen), found only in two other, distant, Eastern 

 localities, one of them being in China. The last-named of these 

 forms had been previously described as a Bellerophon, whilst the 

 rugose interior aspect of the larger valves of Lyttonia had been 

 regarded as fish teeth. 



Attention was called to the absence of any recognizable Devonian 

 group in the Range and to the recent interesting discovery by Dr. 

 H. K. Warth, Ph.D., Indian Public Works Department, of what are 

 claimed to be Devonian fossils ; particularly those of the genus Conu- 

 laria ; inclosed both as rolled fragments in the matrix and also in 

 derivative pebbles, within a certain conglomerate-layer, traceable for 

 miles in the eastern part of the Range above the Mayo Salt Mines, 

 and included in the upper part of an olive group of rocks referred 

 by Dr. W. Waagen and the author, when jointly classifying the 

 Salt Range series, to a presumably Cretaceous horizon. Specimens 

 of the Gonularia were exhibited, which, on being compared with a 

 published figure of Conularia ornata from the Devonian formation, 

 presented a striking identity, but no published determination of 

 these Salt Range forms was as yet known. 



It was pointed out that none of the Himalayan or other neighbour- 

 ing rocks (including those of the Salt Range) contained any established 

 Devonian horizon, nor any beds with which the pebbles containing 

 these fossils could be actually identified. Still their pale colour might 

 suggest that they came from some part of a very pronounced group 

 in the lower part of the series which had been called the " Magnesian 

 Sandstone Division," resting upon the Silurian or " Obolus zone." 

 The group had, however, hitherto proved quite unfossiliferous. 



Turning unwillingly from this conjecture, if another origin for the 

 pebbles were to be sought, the next most possible supposition would 

 be that the parent rock lay to the south and belonged to a land long 

 since buried beneath the alluvial plains and deserts which stretched 

 southwards into Scind— aland perhaps connected with the lost conti- 

 nent of Lemuria, supposed to have united India with Africa. 



One small group of hills called the Korana Hills projects from 

 the plains of the Chenab river, about forty miles southward of the 

 Salt Range ; these had been visited by both Dr. Fleming and by 

 Mr. Theobald. Their dark slaty rocks, however, as described by 

 those gentlemen, afford no clue to the identification of the derived 

 Conularia pebbles, and present no similarity either to any belong- 

 ing to the Salt Range. 



Instances of the occurrence of other detrital deposits in the Range, 

 the coarse materials of which were likewise untraceable amongst 

 the surrounding rocky tracts, were alluded to as strengthening the 

 supposition of a lost continent to the south, which had furnished hard 

 metamorphic detritus at various periods in the history of the Salt 

 Range. These deposits were found immediately overlying the salt 

 and gypseous marl at the base of the series : again near the Silurian 



