MESOZOIC RAUIATA. 65 



Clypeus alius (M^Coy). 



»^. Char. Subhemisplierical, base nearly circular, posterior in- 

 terambulacral space slightly produced in the middle and sub- 

 truncate ; length and width equal (each about 1 inch 9 lines), 

 height half the width ; upper surface evenly convex ; oral disc 

 strongly undulated towards the margin by the convexity of 

 the interambulacral spaces and the depression of the ambula- 

 cra ; vertex central, with a very narrow, deep anal sulcus ex- 

 tending from thence to the margin where it is slightly dilated 

 and spoon-shaped ; mouth small, a little in front of the middle, 

 indented by the five tumid ends of the interambulacra ; ambu- 

 lacra narrow, upper two-thirds of their dorsal portion petalloid, 

 lower third and oral portion of parallel rows of unconnected 

 pores. 



In form and undulation of the base this resembles the C Hugi 

 (Ag.), but is distinguished by the narrow anal sulcus extending 

 quite to the vertex, instead of being confined to the margin ; the 

 deflected lip -like projection of the posterior interambulacral space 

 is very remarkable. 



Common in the inferior oolite of Bridport. 



[Col. University of Cambridge.) 



Exclusive of the above new species, I have, since the publication 

 of Mr. Morris's Catalogue of British Fossils, recognised the 

 following Mesozoic Radiata not included in it, examples of all 

 of which are in the Geological Collection of the University of 

 Cambridge, 



AMORPHOZOA. 



OCELLARIA. 



anguslaia (Reuss sp.). Scyphia id., Verstein, bohm. Kr. 



Chalk, Cambridge (drift). 

 peduncidata (Reuss sp.). Scyphia id., Verstein. bbhm. Kr. 



Chalk, Cambridge (drift). 

 Scyphia. 



Bro7inn (Miinst.), Goldfuss, Petrefacten. Great Oolite, Minohinhampton. 

 cylindrica (Gold.), Petrefacten. Coralline Oolite, Malton. 



heteromorpha (Reuss), Verstein. bohm. Kr. Greensand, Lyme Regis. 



Spongia ? 



helveloides (Lamx.), Exp. Meth. Pol. Great Oolite, Minchinhampton. 



ZOOPHYTA. 



Agaricia. 



elegans (Michel), Icon. Zooph. Inferior Oolite, Dundry. 



ASTR^A. 



covfuens (Gold.), Petrefacten. Great Oolite, Minchinhampton. 



gracilis {M\in%i.), Goldfuss, Petrefacten. Great Oolite, Minchinhampton. 

 helianthoides (Gold.), Petrefacten. Coralline Oolite, Steeple Ashton. 



E 



