FROM THE UPPER GREENSAND. 187 



CoTTALDiA Benetti^, Koiliff. PI. XLV, figs. 1, 2, 3. 



EcHTNCS BENETTI^, Konig. Icones Foss. Sectiles, p. 2, pi. iii, fig. 3,5, 1825. 



— GRANULOSUS, Munster, Pet. Germ., p. 125, pi. xlix, fig. 5, a. b, 1826. 



— — Grateloup. Mem. Oursins Fossiles, fichiiiides, p. 82, 1836. 

 Aebacia granulosa, Agassiz. Cat. Syst., p. 12. 



— — Morris. Cat. of British Fossils, p. 48, 1843. 



— — Agassiz et Desor. Cat. Rais. des Echinides, Ann. des Sc. 



Nat, 3rd series, vol vi, p. 356. 

 Echinus granulosus, Forbes. Mem. Geol. Surv. Organic Remains, Decade I, pi. 



vi, 1849. 



— — Forbes in Morris. British Fossils, 2nd ed., p. 79, 1854. 

 Cottaldia granulosa, Desor. Synop. des Echinid. Foss., p. 114, pi. xix, fig. 1 — 3, 



1858. 



— — Cotteau. Paleontologie Fran9aise, Ter. Cretace, t. vii, p. 789, 



pi. 1193 and 1194, 1—9, 1866. 



Diapiosis. — Test small, globular, nearly equally depressed at both poles ; plates 

 of both areas very narrow, the inter-ambulacral supporting a horizontal series of small, 

 equal-sized, imperforate, spiniferous tubercles, from eight to twelve in a row ; the ambu- 

 lacral tubercles of the same size, less numerous, and packed obliquely together ; poriferous 

 zones very narrow, pores unigerainal throughout ; apical disc very small ; mouth-opening 

 large, placed in a depression ; peristome slightly decagonal, notches feebly marked. 



Dimensions. — Altitude, nine twentieths of an inch ; latitude, six tenths of an inch ; 



the relation of the altitude to the latitude varies considerably, 



some being more conical, others more depressed than others ; in 



four specimens the ratio was 17 to 10, 15 to 11, 12 to 11, and 



12 to 8. 



Description. — This beautiful little Urchin was first figured by M. Konig in his 



' Icones Fossilium Sectiles ' under the name of Echinus Benettice, in honour of a lady 



who had long made the fossils of Wiltshire her especial study, and had published a valuable 



catalogue of the same ; a year later the German forms of this species were figured and 



described in Goldfuss' ' Petrefacta Germanise ' imder Count Minister's name Echinus 



granulosus ; subsequently it was entered in Agassiz and Desor's ' Catalogue Raisonne des 



Echinides ' at the head of the list of their second type of Arhacice with uniform 



tubercles on all the surface of the test; and, lastly, M. Desor established the genus 



Cottaldia for this small group, which was characterised by having the surface of the small 



test covered with spiniferous tubercles, uniform in size and regular in arrangement. 



