Vol. 52.] A DELIMITATION OF THE CENOMANIAN. 143 



Mr. F. G. H. Price in regarding the glauconitic sand above the 

 Gault at Folkestone as Chloritic Marl, not Upper Greensand. 

 We have also found St. Carteri in the Chloritic Marl with phosphatic 

 nodules near Devizes and Warminster, and Dr. Hinde informs us 

 that it occurs at the same horizon at Eastbourne and Selborne. 

 It is clearly, therefore, a fossil especially characteristic of this 

 horizon, though it may possibly range a few feet up into the Chalk 

 Marl. 



We are also informed by Dr. Hinde that there are specimens in 

 the British Museum from La Heve, and we are now able to say that 

 it is common there in what we regard as the equivalent of the 

 Chloritic Marl, namely the basal bed of the Cenomaniau, and in the 

 bottom of the overlying bed, but at no higher horizon. 



Echinodermata. 

 Goniophoetjs, sp. 



A small specimen from the Chloritic Marl, which has all the 

 characters of this genus, but differs from G. lunulatus in several 

 respects. The apical disc, instead of being in low relief with a 

 large aperture or periprocte, has its edges raised into rough tuber- 

 cular ridges, which, with the similarly raised edges of the periprocte 

 and a set of transverse bars or carinas, make a curious pentangular 

 pattern in five compartments surrounding the periprocte. These 

 ridges are not plain and straight, as in G. lunulatus, but curved, so 

 that the outline of the pentagon is irregular. 



The test is less elevated than in G. lunulatus ; there are only four 

 tubercles in a row on the interambulacral areas, and the lower 

 tubercles are very small, there being only three large ones on each 

 area. The ambulacral areas are very prominent, and swell out 

 towards the mouth. 



Whether this is more than a very aberrant variety of G. lunulatus 

 must depend on the discovery of others with the same characters ; 

 but it differs so much from the types figured by Cotteau and Wright 

 that we felt the desirability of calling attention to it. 



Codiopsis doma, Ag. 



This sea-urchin has not previously been found in England, and, 

 as it is specially characteristic of the Cenomanian of the Sarthe, its 

 occurrence in Devon is interesting. The determination is due to 

 Mr. C. J. A. Meyer, in whose cabinet the only known English 

 specimens are. M. Bizet having kindly sent us two specimens 

 of the large inflated form of the species, we forwarded these to 

 Mr. Meyer, who reports that his are quite small in comparison. 

 Probably they belong to the variety C. pisum of Desor. 



Hemiastek, btjfo, Desor, in d'Orb. ' Pal. Fr. Terr. CreV vol. vi. 

 p. 227, pi. 873. 



This is a common species in the North-west of France. It is 

 especially abundant at Blangy, Yimoutiers, and Villers-sur-Mer, but 



