SRIPERUMBUDUR— SYHADRITE. 113 



name Semri, and they were afterwards known generally as Lower 

 Vindhyan. In 1906 E. Vredenburg used the term " Son series" for 

 these rocks. Originally the Sub-Kaimurs probably included also 

 rocks afterwards separated as " Transition " from the Vindhyan 

 system ; the term was not specifically limited below (cf. J. G. 

 Medlicott, Mem., Geol. Surv., Ind., II, 138, 1860). 



Sub=metamorphic— See Transitions. 



SubrobustllS beds. — Name proposed by C. Diener in 1895 (Denies. 

 K. Akad. Wiss. "Wien. 1895, 548) for the upper division of the 

 Lower Trias in Painkhanda, because he considered the type 

 specimen of Ceratites siibrobustus (=Keyserlingites Dieneri Mojs) to 

 have been derived from its topmost layers, in which Flemingites 

 rohilla is the leading fossD. But this specimen was probably 

 extracted from a detached block of the overlying Muschelkalk, 

 since H. H. Hayden and A. v. Krafft have obtained numerous 

 examples of Eeyserlingites (Durgaites) Dieneri and its allies 

 from the Muschelkalk, but not a single specimen from the 

 lower Trias. The name " Subrobustus beds " must be discarded 

 and replaced by " Hedenstraemia beds " introduced by A. v. 

 Krafft (Director's Genl. Rep., 1899—1900, 207), for this rock 

 group. 



SulcaCUtUS beds.— So called by C. Diener (Denies. K. AJead. Wiss., 

 Wien, LXII, 584, 1895) from the characteristic belemnite. The 

 bed, consisting of a ferruginous oolite, constitutes a very constant 

 horizon (callovian) at the base of the Spiti shales from Spiti to 

 Evans. 



Sullavai sandstones.— Named by W. King (Mem., Geol. Surv., Ind., 

 XVI1T, 227, 1881) from a village (18° 12' ; 80° 10') in the Godavari 

 valley, where the Sullavais rest unconformably on the Pakhal 

 series, and include beds which weather into forms recalling the 

 pinnacled quartzites of the Paneum stage in the Kurnool system. 

 Similar rocks occur further north in the Pranhfta valley, where 

 they were identified byW. T. Blanford (MS. report. 1866) as 

 Vindhyans. Divided by King (op. cit., 229) as follows : — 

 Kapra sandstones ...... 700 feet. 



Venkatpur sandstones 300 „ 



Eneharani quartzites ...... 600 ,, 



Syhadrite (Syhedrite).— Name given by C. L. Sheppard (Amer., 

 Journ. Sci., 2nd ser., XL., 110, 1865) to one of the minerals in the 



