86 HOLLAND AND TIPPER : INDIAN GEOLOGICAL TERMINOLOGY. 



as a rule, confined to one locality. They are considered 

 to correspond very closely with the Middle Ordovician 

 rocks of the Baltic province. 

 Negrais formation.— Originally distinguished by W. Theobald as 

 " a series of beds stretching northward from Cape Negrais along 

 the Arakan range and coast. . . .and regarded as probably em- 

 bracing the beds of the Nummulitic group." No fossil evidence 

 being obtainable, Theobald (Mem., Geol. Surv., Ind., X, 299, 1873) 

 proposed to " retain the term with a somewhat extended appli- 

 cation, making it embrace all the rocks met with in the above 

 district older than the Nummulitic, and newer than the Triassic " 

 (Axials). The rocks are mainly hardened and contorted sand- 

 stones and shales, seamed with quartz and calcite veins, with 

 occasional limestones. The degree of alteration is irregular and 

 capricious, and their distinction from the fossiliferous Cretaceous 

 and Nummulitic rocks may be a matter of secondary alteration. 

 Neobolus beds. — Originally described by A. B. Wynne (Mem., Geol. 

 Surv., Ind., XIV, 86, 1877) as the " Obolus or Siphonotreta beds," 

 from the prominent brachiopod. The beds form a part of the 

 Cambrian strata of the Punjab Salt Range, which was named 

 by F. Noetling the Kussak (Khussak) stage (q. v.). 

 Neogene. — Term used by F. Noetling (Pal. Ind., New Ser., I, 51, 

 1899-1901) for those fossils in the Tertiary of Burma which are 

 identical with, or are closely related to, species living in the Indian 

 Ocean. 

 Nepaillite. — Name given by H. Piddington (Journ. As. Soc. Beng., 

 Vol. XXIII, 170, 1854) to specimens from Nepal, which were 

 subsequently proved by F. R. Mallet (Rec, Geol. Surv., Ind., 

 Vol. XVIII, 235, 1885 ; Man. Geol. Ind., Pt. IV Mineralogy, 30) 

 to be tetrahedrite of an ordinary type. 

 Nerinea beds. — The uppermost Cretaceous beds of the Pondicherry 

 area (Warth's Horizon F, Rec., Geol. Surv., Ind., XXVIII, 18, 1895). 

 So named by F. Kossmat (Rec., Geol. Surv., Ind., XXX, 54, 1897) 

 from the presence of large specimens of Cerithium, originally 

 described as Nerinea. Correlated by Kossmat (loc. cit., 70) with 

 the Daman on account of the presence of Nautilus danicus, and 

 with part of the Ninniyur beds in the Trichinopoly area. 

 Newboldite. — Name given by H. Piddington (Journ. As. Soc. Beng., 

 Vol. XVI, Pt. 2, 1129, 1847) to a mineral from Kurnool which he 

 believed to be a double sulphide of iron and an earth. F. R. 



