MM. Reid fy Sharman — On the so-called " Gault" in Norfolk. 55 



of the Fungidas. Turbinoseris de Fromenteli, nobis, therefore retains 

 its title, and Mr. Tomes cannot term it Zeptophyllia Anglica, Tomes. 



Mr. Tomes remarks (p. 545), "Some other compound corals have 

 been collected at Haldon which, from their unsatisfactory condition, 

 cannot be determined, though I believe them to be new. As the 

 Haldon corals are only casts, they cannot be trusted when internal 

 structure is important. The genus Halclonia is in my opinion a very 

 doubtful one. Specimens in my own collection from Haldon differ 

 in the important respect of sometimes having a styliform columella, 

 and sometimes only a ring of pali, as in Prof. Duncan's figures." 

 Haldonia was described and figui'ed by me (Quart. Journ. G-eol. Soc. 

 1879, vol. xxxv. p. 91), and like all the other forms I studied was 

 not in the form of cast. Haldonia Vicaryi, nobis, was described from 

 perfect specimens, and they had no columella. Corals of the same 

 species, so far as my experience helps me, do not sometimes have a 

 columella, and sometimes not and only pali. Probably the specimen 

 seen by Mr. Tomes with a columella was the well-known Actinacis 

 of Haldon. 



I draw attention to the figures on the Plate (Geol. Mag. 1885, 

 PI. XIV. Figs. 14-15), and protest against species being determined 

 from such fragments. 



Finally, on looking at Fig. 13, which is said to represent a 

 Pleurosmilia, it will be noticed that the columella does not terminate 

 by uniting with one of the principal septa which is more developed 

 than the others. The form does not belong to that genus, but to 

 Placosmilia, Ed. and H. 



Summary, Etc. 



Smilotrochus insignis, nobis, non Ceratotrochus insignis. 



» granulatus, nobis, non Trochocyathus Wiltshirei. 



Micrabacia Fittoni, nobis, non Cyclocyaihus Fittoni, Ed. and H. 

 Podoseris mammiliformis, nobis, non Rhizangia mammiliformis. 



elongata, nobis, non Rhizangia elongata. 



Turbinoseris de Fromenteli, nobis, non Leptophyllia Anglica, Tomes. 

 Pleurosmilia neocomiensis, E. de From, fide Tomes, is Placosmilia. 

 Haldonia, nobis, has no columella. 

 Syzygophyllum, Reuss, non Rhizangia, Ed. and H. 



III. — On the so-called " Gault " of West Dereham, in Norfolk. 



By Clement Reid, F.G.S., and George Sharman. 

 (Published by permission of the Director- General of the Geological Survey.) 



INCE the publication of William Smith's Map of Norfolk in 

 1819, the sections around West Dereham and Shouldham have 

 been accepted as proving the occurrence of true Gault l in this part 

 of West Norfolk. Messrs. Rose, 2 Fitton, 3 and later writers, all 



1 The Kimmeridge Clay is also locally known as " Gault." 



2 Phil. Mag., series 3, vol. vii. pp. 171 — 182. 



3 Trans. Geol. Soc, series 2, vol. iv. p. 312. 



