452 ADDITIONAL NOTES 



was impressed with the idea that they were foreign fossils, and was averse to their being 

 drawn as British Echinidae ; the history of the specimens, however, convinced me that they 

 were Enghsh, although their locality was then unknown. Some time after the publication 

 of the first part of this work, I went to Oxford for the purpose of examining the late Dr. 

 Buckland's collection, and in one of the drawers of his cabinet I saw a Cidaris ^nitliii, 

 from the same rock as that in which my doubtful specimens were imbedded. I lost 

 no time in visiting the locality, Bullington Green, near Oxford, whence it was ob- 

 tained, where I found several plates of tests and fragments of spines of the species. 

 From this locality Mr. Whiteaves, of Oxford, lately collected a very large specimen of 

 Cidaris Smithii, which, through that gentleman's kindness, is now in my cabinet. This 

 test measures three inches and three quarters in diameter, one third more than the 

 largest specimen previously known, and has the jaws and teeth in situ. In the same 

 stratum of Coral Rag at Bullington, I found EcMnobrissus scutatus, Lamk., Pygaster 

 umbrella, Agas., and P y gurus pentagonalis, Phil. I have lately obtained Cidaris Smithii, 

 Wr., from the Coral Rag at Hillmarton, Wilts, where it is associated with Cidaris Jlori- 

 genima, Phil., Pseudodiadema versipora, Woodward, and Fygaster umbrella, Agass. This 

 is the original locality whence Dr. William Smith obtained the specimen now in the British 

 Museum. 



DiPLOCiDARis Wrightii, JDcsor. PI. XLI, fig. 6, 7, Supplement to page 58. 



A very fine, large specimen of this gigantic Cidaris was discovered by my friend, the 

 Rev. T. W. Norwood, in the Inferior Oolite at Shurdhigton Hill, near Cheltenham. 

 Unfortunately, I have only been able to figure one of its largest spines. This was 

 undoubtedly, one of our largest Oolitic Cidaridse, and, from Mr. Norwood's description, must 

 have attained a gigantic size, as appears by the following note, which that gentleman 

 has kindly supplied. 



"The urchin, of which I sent you the fragments about a year ago, was found by me 

 in the Pisolite of Shurdington Hill, under the following circumstances. A very thin, 

 sandy, band divided two compact and indurated rock-masses forming a plane of 

 easy and natural separation between them. In this band the urchin had been 

 locked up, apparently in a state of wonderful preservation, and in the posture of life, with 

 its equator evenly parallel to the divisional plane of the strata, and its magnificent spines 

 (such as I have nowhere else seen) radiating regularly around it. The ground had chanced 

 to be broken at this point for the purpose of quarrying stone for wall-making; the upper 

 rock-bed had been removed down to the sandv band; and, in its removal, had torn 

 the urchin in two at the equator, and carried away half the test and a corresponding 

 number of spines. Therefore, when I came to the place and discovered the specimen, it 

 was lying on the surface of the lower rock-bed, showing five or six large spines, which 

 appeared to diverge from a circular space, about equal in diameter to the equatorial 



