AND OTHER ENGLISH NTJMMULITES. 



147 



Belgium, and typical. He did not find N. Heberti (having a small 

 central chamber) with it, though accompanying it in Belgium and 

 Prance. 



III. Ntjmmtjlites l^vioattjs (Bruguiere). 



This species has been so well described by D'Archiac and other 

 authors * that its structure need not be treated of here. It is 

 well figured in the 4 Min. Conch.' vol. vi. pi. 538. fig. 1. 



The range of Nummulites Icevigatus in England is limited. The 

 Bev. 0. Fisher has carefully defined its zones and localities, 

 Quart. Journ. Geol. Soc. vol. xviii. In the Bracklesham series at 

 Whitecliff Bay (p. 72) in the bed VII. (part of Prestwich's 

 " no. VZ ") : in VI. (Prestwich's " no. 11 ") ; in IV. (Prestwich's 

 " no. 9 "). At Bracklesham Bay (p. 75) in the beds 6 and 4 ; and 

 at Bury Cross, near Gosport (Pilbrow). At Alum Bay its zone was 

 indicated by Prof. Prestwich many years ago as a lower part of that 

 thick bed, no. 29, which also comprises the glauconitic clay with 

 JV. elegans, Quart. Journ. Geol. Soc. vol. ii. p. 257 ; but this is very 

 doubtful. N. Icevigatus has also been found in the Wells at Wel- 

 lington College and Woking Asylum. 



According to Dr. Ph. De la Harpe the Bracklesham Nummulites 

 comprise both N. Icevigatus and N. Lamarcki, the latter having a 

 large central chamber ; and he thought that they indicate a horizon 

 "at the top of the 'Paniselian' or at the bottom of the ' Brux- 

 ellian' Stage." Catal. Eoss. Poram. Brit. Mus. p. 91. 



A table of the range of Nummulites in England is given on the 

 next page. 



* Dr. Ph. Be la Harpe ('Num. Suisse,' 1881, p. 29) has noticed that in his 

 synonymy of this species in the 'Prodrome,' vol. ii. 1850, 25 e etage, 1302, 

 D'Orbigny has by mistake given the name of elegans instead of Icevigatus to 

 fig. 1. pi. 538, 'Min. Conch.' 



