66 Messrs. T. R. Jones and W. K. Parker on 



mens came from the east side of this hill, where the Crag 

 deposit appears to have been sheltered ; whilst on the west side 

 the Crag is almost indurated, and its material comminuted." 

 Mr. Wood adds that the true Bryozoan bank of the Crag (in 

 which he found but few Foraminifera) is to be seen in the neigh- 

 bourhood of Aldborough, Sudbourne, and Orford, overlying the 

 bed wherein shells, with occasional Actinozoa and Bryozoa, 

 abound. 



The geological relations of the several deposits of " Crag " in 

 Norfolk, Suffolk, and Essex have been treated of by Mr. Charles- 

 worth in the 'Proceedings of the Geological Society,' 1835, 

 vol. ii. p. 195, &c. (" On the Crag of part of Essex and Sufi'olk''); 

 in the * London and Edinb. Phil. Mag.' (Nos. 38 & 42, August 

 and December 1835), ser. 3. vol. vii. pp. 81, 465, &c. (" Observa- 

 tions on the Crag-Formation and its Organic Remains, &c."), 

 and in the 'Report of the British Association' for 1836, Trans, 

 of Sections, p. 84 (" A Notice of the Remains of Vertebrated 

 Animals found in the Tertiary Beds of Norfolk and Suffolk ") ; 

 also by Sir C. Lyell, in the * Mag. Nat. Hist.' 1839, new series, 

 vol. iii. p. 313, &c. (" On the Relative Ages of the Tertiary De- 

 posits, commonly called the * Crag,' in the Counties of Norfolk 

 and Suff"olk "). Of the three recognized divisions of the " Crag," 

 the lowest has been known as the "Coralline Crag" ever since 

 Mr. Charlcsworth so named it in 1835, on account of its abound- 

 ing with little coral-like fossils, which, however, when duly 

 studied, were found to be Bryozoa (Polyzoa), Corals being ex- 

 ceedingly rare in it. "Bryozoan Crag" ought, therefore, to 

 take the place of this common misnomer ; but " White Crag," 

 " Lowest Crag," and " Suffblk Crag " are still better names for 

 this division, and are already in use. For general and special 

 information on the Crag deposits, the reader can also refer with 

 advantage to Lyell's 'Manual of Elementary Geology,' 5th edit. 

 1855, chap. xiv. ; and to Phillips's 'Manual of Geology,' 1855, 

 chap. xiii. In reading the latter, however, "Bryozoan" must 

 be substituted for " Coralline " and " Zoophytic," with reference 

 to the particular fossils and beds referred to. 



The collection of Foraminifera obtained by Mr. S. V. Wood 

 from the Crag of Sutton comprises about forty-five reputed spe- 

 cies, or species and important varieties recorded binomially; 

 and here we must remark that though, zoologically speaking, 

 many of the recognized forms of Foraminifera are not species, 

 but merely varieties, of diff'erent systematic values, yet, for the 

 sake of convenience to zoologist and geologist, they have received 

 and retain binomial appellations, that stand in the lists like spe- 

 cific names. The zoological value of these names is critically indi- 

 cated in our papers on the " Nomenclature of the Foraminifera," 



