O'RILEYITE— PACHMAKHt 9l 



Otoceras beds and the Kuling shales in the Himalaya, and 

 between the Chidru stage and Lower Ceratite limestone in the 

 Salt Range, that is, a horizon equivalent to the line between the 

 Bellerophonkalk and Lower Seis beds in the Eastern Alps. As 

 the beds lie in a perfectly conformable sequence according 

 to every observer who has seen them in the field, the question is 

 one of small importance. F. Noetling (Neues Jahrb. /. Min., 

 XVIII. Beilagebd., 1904, 546, 552) distinguishes the following 

 three zones among the Otoceras beds of Painkhanda : — 

 3. Zone of Ophiceras tibeticum Griesb. 

 2. ,, ,, Episageceras Dalailamas Dien. 

 1. ,, ,, Otoceras Woodwardi C4riesb. 

 C. Diener (Centralblatt f. Min. ,1905, 2 ; Pal. hid., XV, Vol. VI, 

 Mem. No. 1, 165, 166, 1909) objects to an artificial division into 

 separate zones of a perfectly uniform fauna ; he points out that 

 Ophiceras tibeticum is not restricted to the top layer, Otoceras 

 Woodwardi is not confined to the base, while Epi. Dalailamw 

 is found in the main layer of 0. Woodwardi and the overlying 

 shales. Diener thus regards the whole bed as one zone, that of 

 " Otoceras Woodwardi and Ophiceras safcuntala." 

 Owk shales. — Named from the large village of Owk (Auk) (15° 12'; 

 78° 10') in the Kurnool district by W. King (Mem., Geol. Surv., 

 Ltd., VIII, 67, 1872). Typically white or buff-coloured, non- 

 calcareous shales shading into purple and brown forms. The 

 Auk shales form the upper part of the Jammalamadugu stage 

 of the Kurnool series. 

 Pab sandstones. — Name used by E. Vredenburg (Rec, Geol Sun., 

 Incl.. XXXV. 117, 1907) for a thick formation mainly of coarse 

 sandstones in the Pab range in Jhalawan, Baluchistan. They 

 correspond in age with the Cardita Beaumonti beds of Sind 

 which E. Vredenburg (Rec., Geol. Surv.., Ind., XXXVI, 192, 

 1908) regards as Meestrichtian reaching to Lower Danian. Beds 

 of this age occur also in the Suleiman range (Rec, Geol. Surv., 

 Ind., XXXVI, 241, 1908). 

 Pachmarhi Stage.— The lowest stage of the Mahadevas in the Sat- 

 pura region, but in thickness greater than the upper two stages, 

 Denwa and Bagra, together. Named by H. B. Medlicott (Mem., 

 Geol. Surv., Ind., X, 155, 1872) from the summer headquarters 

 of the Central Provinces Administration (22° 27' ; 78° 29') in 

 the Hoshangabad district. 



