ECHINODERMATA. 133 



Vermicularia Phillipsii, Roemer. 

 Vermicularia Phillipsii, Roemer, Kreide, p. 102, t. 16, f. 1. 



„ Sowerhyi, Phillips, Geol. Yorkshire^ i. pi. H., 



f. 29. 

 Localities. Upware, Brickhill, Speeton. 

 N. Europe. Schoppenstedt, Heligoland. 



Vermicularia polygonalis, Sowerby. 



(Plate VII. fig. 8, a, h) 



Vermetus polygonalis, Min. Con. pi. 596, f. 6. 



When the outer layer of the shell is removed the keels on the 

 whorls become very obscure. 



Localities. Upware, Hythe, Sandgate. 



N. Europe. Near to V. quinque carinata, Roemer, from the 

 Bredenbeck Hils thon. 



ECHINODERMATA. 



(See ante, p. 28). 



Cidaris, sp. nov. ? 

 (Plate vii. fig. 9.) 



Several examples of the stout thorny spines of a Cidaris are 

 preserved in the Woodwardian Museum. 



An imperfect specimen measures 3J inches in length, the shaft 

 being 4 mm. in diameter at its head end, and tapering to 2J mm. 

 at its (broken) apex. The thorns are irregularly scattered, and 

 appear to have been directed upwards ; both shaft and thorns are 

 rounded in section. Between the thorns the shaft appears to the 

 unaided eye to be smooth, but the magnifying glass shews it to be 

 delicately striated longitudinally. . The head and collar are rather 

 small (greatest diam. 5 mm.), and have a tumid and obtuse 

 appearance. 



