W. S. M. — Notes and Queries on English Strata. 355 



should be given similar names. Under such 

 schists might be called as follows ; — 



Argillyte Argillous-schist Micasyte 



Chiastolityte Chiastolite-schist EJornblendyte 



Phyllityte Phyllite- schist ActitioliUjte 



Carbonyte Carbonaceous-schist Chhrityte 



Alumyte Alum-schist Talcyte 



Spilyte Calcareous-schist Garnetyte 



Bolomityte Dolomitic-schist ShorVyte 



Quartzyte Quartz-schist Rhcetidtyte 



Itacolumyte Flexible quartzyte Hematityte 



Itabiryte Ferruginous quartzyte Pyrityte 



Felsityte Felsite-schist I Pyrrhotityte 



In this list has been retained such old terms 

 myte, and Itabiryte, as they are already in use. 



a nomenclature the 



Mica-schist 



Hornblende-schist 



Actinolite-schist 



Chlorite-schist 



Talc-schist 



Garnet-schist 



Tourmaline-schist 



Magnesia-schist 



Mico-iron-schist 



Pyrite-schist 



Pyrite-schist 



as Spilyte, Itacolu- 



VII. 



-Notes and Quekies on the Classification and Nomen- 

 clature OF THE English Strata. 

 (Communicated by W. S. M.) 

 {Continued from page 115.) 



Ahhreviations. — A. a. — Eecognized as a separate formation with defi- 

 nite limits, by 

 b. — In the year 

 c. — Where published 

 d. — Under the name 

 e. — Origin of the name 

 B. — Changes in previous grouping or name. 

 C. — Subsequent changes. 

 Lower G-reensand. A. (a) Fitton. (6) 1824. (c) Ann. Phil. vol. 

 viii. n.s., p. 371. (d) Greensand. (e) Eetained the title green 

 sand because it had " been adopted so very generally by the 

 geologists of England," but protested that the term was "ob- 

 jectionable, as being derived from a character which is not 

 only very variable, but in reality does not belong to the 

 greater part of this stratum." [Queiy— When was "Lower" 

 added to the name ?] 

 See supra p. 114. 



" Neocomian " was first used as a name for the Lower 

 Greensand of England by Dr. Fitton in his paper on Ather- 

 field, Jan. 1845. Journ. Geol. Soc, vol. ii., p. 55. 



The subdivisions " Folkestone beds," " Sandgate-beds," 

 " Hy the-beds " (Kentish-rag), and "Atherfield Clay" were 

 first recognized by the Survey, after the work of Messrs. Drew 

 and Foster in 1863. The first three of these groups were re- 

 cognized by Dr. Fitton in his paper on the "Strata below the 

 Chalk," 1827, Geol. Trans., ser. 2, vol. iv. p. 115, but they 

 were not named. The names are those of the places where 

 the formations are best seen. 

 Weald Clay. A. (a) Fitton. (6) 1824. (c) Ann. Phil., vol. viii., 

 n.s., p. 373. (d) Clay (of the Wealds and Tetsworth), at p. 

 369, and Weald Clay, p. 373. (e) Conybeare and Phillips 



B. 

 C. 



