MYSORE— N AMY ATJ. 83 



series into a lower, or Subathu, stage, a middle, or Nahan stage, 

 and an Upper, or Siwalik, stage. The last two are now grouped 

 in one as the Siwalik series, the Nahan being the lowest of the 

 three stages in the series. C. S. Middlemiss (Mem., Geol. Surv., 

 Ind., XXIV, 86, 1891) noticed the development of red shales in 

 the lower part of the Nahan stage in the United Provinces as in- 

 dicative of conditions resembling those under which the Sirmur 

 beds were deposited, but no superposition of the two series (Sir- 

 mur and Siwalik) was seen, such as has been noticed by G. E. 

 Pilgrim (Rec., Geol, Surv., Ind,, XL, 188, 1910) in the. North- West 

 Punjab. Pilgrim has also summarised the evidence for the age 

 of the Lower Siwaliks (Nahan) and concludes that the beds are 

 Tortonian to Sarmatian (Joe. cit., 190, 193). For references to the 

 Lower Siwaliks of Sind and Baluchistan , see Manchhar. 

 Nallamalai series. — Named by W. King (Mem., Geol. Surv., Ind., 

 VIII, 127, 1872) from the principal range of hills in the Cuddapah 

 district. One of the four series of the Cuddapah system com- 

 posed of — 



(b) Cumbum slates. ) , A , 



; ' . , , ... [-about 3,400 feet. 



(a) Bairenkonda quartzites. ) 



Namhsim beds.— Name used by T. H. D. La Touche (Director's General 

 Report, Rec, Geol. Surv., Ind., XXXVII, 53, 1908), for a series 

 occurring in the gorge of the Namhsim river in the Northern 

 Shan States. Later work (Mem,, Geol, Surv., Ind,, XXXIX, 

 130, 1913) proved the existence of two fairly well-marked 

 divisions : — 



(2) The Upper Namhsim stage or Konghsa marls, a thinner band 



of marly beds with hard limestones. 

 (1) The Lower Namhsim stage, consisting of sandstones. 



The fossils, which were examined by F. R. Cowper Reed (Pal. Ind. 

 New Ser., Vol. II, Mem. No. 3) had been collected before the de- 

 tailed stratigraphy had been worked out. They indicate a hori- 

 zon corresponding closely to the Wenlock. 

 Naitiyau beds. — Red or purple sandstones and shales so named by 

 T. H. D. La Touche (Director's General Report for 1899-1900, 85) 

 from the Namyau valley, Northern Shan States, where they are 

 well exposed. The same beds were referred to by P. N. Datta 

 (loc. cit., 118) as the Thibaw (Hsipaw) series. The sandstones 

 are unfossiliferous, but the beds below are interstratified with 



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