82 PROCEEDINGS COTTESWOLD CLUB 1912 



TROCHOTIARA DEPRESSA (Agassiz) 



The following records are additional for this sea-urchin, 

 whose generic name was formerly " Pseudodiadema." 



Top-Be'ls {schl(xnbachi)~Pea.s-Hi\\ Quarry, near the New Inn, 

 Shipton Gorge: {^ayantiaiia), Limekiln Quarry, Hadspen, near 

 Castle Cary. 



ERRATUM IN MAIN PAPER. 



Page 155, Table I. — Insert " Lower Tngonia-Grit " 

 between Buckmani-Grii and Upper Snowshill Clay. 



EXPLANATION OF PLATE VIII. 



Figs, la and /;.--Hyboci.ypeus cf. ovalis Wright. 



la — actiiial view ; j/> — lateral view. 



Horizon : Hadspen Stone ( garaiitiawr). l.orality : Hadspen, near Castle Cary, 



Somerset. Collection : I.. Ricliardson. 



Figs. 2a, b and <-.— Hyi50CF.ypi;us sl'iu^ii^bi-iiulus, sp. nov. 



la — actinal view ; lb — abactinal view ; ic — lateral view. 



Horizon ; Garantiaiia-\\^ii%. Locality : Woolston, Somerset. 

 Collection : L. Richardson. 



FlGS. 3rtr,Z' and f.— HybOCLYPI-US WOOLSTONENSIS, sp. nov. 



3a — actinal view ; "^h — abactinal view ; 3^ — lateral view. 



Horizon. (7a;v7«/?'(i;/(j-I5ods. Localitv : Woolston, Somerset. 

 Collection ; I.. Riclwrdson. 



'flu figures are natural size. 



