Lists of the Mollusca found in the Bed and Norwich Crags.
This list is compiled like that of the Coralline Crag, with the exception of the Norwich-Crag species, which are largely supplemented from the late Dr. Woodward's list in the Rev. J. Gunn's 'Geology of Norfolk,' and from the lists furnished me by Mr. Reeve and Mr. Crowfoot (see pp 455 & 457). The new species introduced in the Red Crag by Mr. Jeffreys, with the assistance of Mr. Bell, are marked J in column I. The names to which a † is prefixed denote species which Mr. Jeffreys identifies with those now living, in addition to those recognized by Mr. Wood. A form regarded by Mr. Jeffreys as a variety ranges through all the columns in italics. In column III. are his critical remarks, with the name first given to the species ; while other names adopted by Nyst for the Belgian species are in brackets. The names to which a ¶ is prefixed denote recent or living species ; but these species having been originally named from fossil specimens before they were known as living, the original names are retained. The species supposed to be derived from the Coralline Crag have Cor. Cr. marked in column III. Column VI. gives the chief localities where the species occurs in the Red and Norwich Crags. Column VII. shows the species which occur in the Coralline Crag, column VIII. those which occur in the Belgian Crags, and column IX. those which are found at Monte Mario. For columns IV., V., and IX. I am indebted to Mr. Jeffreys. The letter d prefixed to species in column II. denotes those bivalves which Mr. Bell informs me he has found perfect or having the valves united in the Red Crag (ante, pp. 330 & 351).
Localities in Red Crag:— A, Alderton; B, Bawdsey; Bw, Brightwell; Bt, Butley; F, Felixstow; Fh, Foxhall; H, Hollesley; R, Ramsholt; S, Sutton; W, Walton-on-the-Naze ; Wd, Waldringfield.
Localities in Norwich Crag and Chillesford Sands :— Ad, Aldeby ; Bl, Bulchamp ; Br, Bramerton ; C, Chillesford ; N, Norwich (pits not particularized) ; P, Postwick ; E, Easton Bavent (Southwold) ; T, Thorpe (Norwich) ; Th, Thorpe (near Aldborough) ; W, Weybourne Cliffs.
Geographical Distribution : — A, Arctic ; Am, North American ; At, Atlantic ; B, British ; M, Mediterranean ; S, Scandinavian ; W, West European.
Depth: — Lt, Littoral; L, Laminarian ; C, Coralline; D, Deep-sea; D, depths exceeding 1200 feet.
Class I. Brachiopoda.
I. Page of Monograph.
II. Name of species.
III. Synonyms and critical remarks.
IV. Zones of depth.
V. Geographical Distribution.
VI. Localities. Red Crag. Norwich Crag.
VII. Coralline Crag.
VIII. Belgium. Sables gris. Sables jaunes.
IX. Monte Mario, Italy.
16. d Terebratula grandis. Cor. Cr. (T. Sowerbyana). Wd S R
21. d Rhynchonella psittacea. L-D BSA S P T Br
