240 Geological Society. 



minoste, which abouud as low down as the Reading Beds, sufficiently 

 indicates their extreme antiquity. 



2. " On the Echinoidea of the Cretaceous Strata of the l,ower 

 Narbada llegiou." By Prof. P. Martin Duncan, M.B., F.R.S., F.G.S. 



A collection of fossils from the limestone near Bag, in \Yestern 

 India, made by Colonel Keatinge, was described by the Author in 

 the Quarterly Journal of the Society for 18G5, and shown to be of 

 Upper Greensand or Cenomanian age. The country was subse- 

 (juently examined, and a sketch-map made by Messrs. Blanford and 

 Wynne, who found near Bag the following beds in descending order 

 beneath the Deccau and Malwa traps : — 



Coralline limestone. 



Argillaceous limestone. 



Nodular limestone. 



Sandstone. 



All were conformable, the whole thickness of limestone did not 

 exceed 50 feet, and the fossils obtained by Colonel Keatinge were 

 shown to have been exclusively derived from the Argillaceous lime- 

 stone. All the beds were referred to the same Cretaceous subdivi- 

 sion. 



Good topographical maps having been prepared, the area was 

 remapped by Mr. Bose, who obtained several additional fossils from 

 the Coralline and Nodular limestones, and a few from the upper 

 beds of the sandstone. He accepted the Cenomanian age for the 

 Argillaceous limestone, but referred the overlying Coralline limestone 

 to a Seuonian age, and the underlying Nodular bed to the Gault, 

 whilst he regarded the sandstone at the base as probably Neocomian. 



Mr. Medlicott, Director of the Geological Survey of India, in com- 

 pliance with the author's request, had sent to him the Echinoidea 

 collected by all the geologists named, and, on examination, the 

 collection was found to comprise the following eight species : — 

 Cidaris, sp. nov., Salenia Fraasi, Cypliosoma cenomanensis, Ortlioj)- 

 sis, sp. nov., Ecliinohrissus Goybeti, JS'ttcIcolites similis,\ar., Htmiaster 

 cenomanensis, and H. similis. All the known forms were found in 

 beds of Upper-Greensaud iige in the Lebanon, Europe, &c., except 

 the Niideolites, which was a Chloritic-mail species. Of the eight 

 species all were found in the Argillaceous limestone, five in the 

 Coralline, and two in the Nodular limestone, the last two, Hemiaster 

 ctnomaiunsis and H. similis, occurring throughout. Under these 

 circumstances there appeared no reason for assigning the beds of 

 limestone to diii'ercnt stages of the Cretaceous system. 



3. " On some Dinosaurian Vertebrae from the Cretaceous of India 

 and the Isle of Wight." By P. Lydekker, Esq., B.A., E.G.S. 



The Author, in 1877, described some Dinosaurian caudal vertebra 

 and a femur from the Lameta beds of India (Middle or Upper 

 Cretaceous), and as he was unable to find any described forms that 



