496 PROCEEDINGS OF THE GEOLOGICAL SOCIETY, 



Pleurotoma Renieri, Ph., add "D" and "At." 



P. striolata, Sc, is from the Red Crag, and not the Coralline Crag, at 



Sutton. 

 Scalaria subulata is not a variety of S. foliacea, but is a distinct 



species. Mr. M'= Andrew dredged it off Teneriffe, in from 40 to 



60 fathoms. 

 8. varicosa is not a variety of S. fimhriosa, but is a distinct species. - 



It is not the Turbo varicosus of Brocchi, nor S. varicosa of 



Lamarck. 

 Trochus millegranus, add " D." 



127. fT. muUigranus : D-D ; At ; S. Also Red Crag. 

 T. tricariniferus (recte tricarinifer) : Swedish expedition, 340-430 



fathoms. 

 Trophon costifei^um (recte costifer) : Swedish expedition, 110-300 



fathoms. 

 Add Vermetus arenarius, L. : C ; M ; Orford. 



The above will somewhat increase the percentage of recent species, 

 but will not, in other respects, materially alter the tabulated results 

 given in my paper on the " Coralline Crag." 



EXPLANATION OF PLATE XX. 



This gives a diagram-section passing through the centre of the Crag district 

 from near Manningtree, by Ipswich, across the hills near Buckenham and New- 

 bourne, passing through Suttou, Butley, Chillesford, Aldborough, Sizewell, to 

 the coast atDunwich, thence along the coast by South wold, Lowestoft and Yar- 

 mouth to Hasborough and Bacton. A branch from the section is prolonged 

 inland from Easton Bavent across the hills near Beccles to Thorpe, near 

 Norwich. The names of the towns and villages are given approximately. 



The relation of the Coralline, Red, and Norwich Crags, of the Westleton series, 

 and of the Boulder-clay series is given generally, and in accordance with ob- 

 served sections referred to in the text and given in detail in the woodcuts. 



COERECTIONS TO PAETS I. and II. 



Page 121. It is possible that the estimate for bed "e," may be 2 feet, and for 

 bed " d" 5 feet, too thick, which would make the thickness of 

 the lower division of the Coralline Crag about 40 instead of 

 47 feet. 



„ 330. Add Pectimculus glycymeris to the list of Butley shells. 



,, 343. Add Mastodon (tooth) to list of fossils found at Sizewell. 



„ 344. For tlie freshwater shells found at Bulchamp and Easton Bavent, 

 see Genei'al List at the end of the third paper. 



„ 346. From some memoranda left by Capt, Alexander, it seems that a 

 portion of the jaw was attached to the Mastodon tooth found 

 at Easton Bavent, and that it was taken out of a spot 5 feet 

 above the base of cliff, and apparently in the clay and not in 

 the sands. 



