90 Scientific Proceedings, Royal Dublin Society. 



3. Obolus band — dark, clunchy , micaceous shales, with small Obolus 



or Siplionotreta. 

 2. Purple sandstones of several hundred feet thickness. 

 1. Salt marl, with salt beds and much gypsum. 



Except the groups Nos. 3, 10, and 11, of this list, most of the 

 series has proved hitherto unfossiliferous, but in disturbed portions of 

 the group No. 9, presumed to be Cretaceous, I found a few lanceo- 

 late leaves and obscure shells, and in No. 4, some sharks' and other 

 teeth. It is in the upper portion of the (presumed) Cretaceous zone, 

 with its glaciated boulders, and also in the basal portion of the 

 almost immediately succeeding early Eocene or perhaps partly Creta- 

 ceous group, that Dr. Warth's recent discoveries of fossils have 

 been made. He writes that at, and below, the outcrop of the 

 coal he found more than one carapace of fossil turtles three-feet 

 in length, accompanied by Belemnites, and fish teeth, all in the 

 same band, probably latest Cretaceous or of earliest Eocene age. 

 He has sent me none of the Chelonian remains, but specimens of 

 the Belemnites and fish teeth, include, according to his own label- 

 tickets, Lamna sp., Otodus s$.,Hemipristis sp., and Capidotus sp. At a 

 lower horizon, but near the last, he found, in the Olive series, a thin 

 band of conglomerate absolutely continuous for several miles, many 

 of the pebbles in which enclose small Conularia, 1 and a few other 

 shells. They occur also in the matrix in a rolled state, for one 

 specimen, to which Dr. Warth calls special attention, is palpably 

 an abraded, rolled Conularia, itself a pebble of the bed, taken from 

 the matrix in this state — according to its label. 2 



1 Specimens exhibited, and presented with the others to Museum, T. C. D. 



2 Dr. Waagen in his Paper ("Note on some Palsezoic Fossils, recently collected by 

 Dr. H. Warth in the Olive group of the Salt Eange." — Records 67. S. Ind., xix. p. 22, 

 just to hand) does not agree in this statement of the case. He asserts the pebbles to be 

 concretions and the beds to contain the fossils in situ. I have other evidence that he 

 spoke of these pebbles as concretions in October, 1885. His Paper had not reached me 

 when I wrote the passage describing the mode of occurrence of the fossils, and my 

 statement was made, both on the authority of Dr. Warth, who is perfectly competent 

 to distinguish pebbles from concretions, whether in, or away from, the bed that had 

 enclosed them ; and also from several examinations of specimens of these pebbles which 

 I had received from Dr. Warth. They are of fine, grayish or brownish non- calcareous 

 sandstone, of even homogeneous texture, well-rounded and worn, the surfaces cutting 

 across the enclosed fossils, and they present no trace of any internal concretionary 

 structure. Even if they have once been possibly nodules, they now bear the entire 

 aspect of worn transported pebbles. 



