﻿PLATE L. 



Echinoconus conicus, Breynius, 1732. 



From the Upper Chalk. 



Fig. 1 a. Upper surface of test, natural size. My collection. (P. 221.) 



h. Under do. do. do. 



c. Apical disc, magnified four diameters. 



d. Inter-ambulacra, ambulacra, and poriferous zones, magnified four diameters. 



e. Do. do. do. near the base, do. 

 /. Primary tubercles and surrounding granules, highly magnified. 



2. Lateral view of a highly conical test. 



3. Primary spine, natural size, and highly magnified. 



4. Do do. do. do. The Rev. Thos. Wiltshire, 

 P.G.S. 



5. Peristome with jaws and teeth in situ do. 



6. The jaws and teeth magnified do. 



7. Small tubercular spines of the dorso-lateral plates, greatly magnified. 



