﻿PLATE XIX. 



Fig. 



1, 1, a, b. Triffonia Damoniana, De Lor. Internal moulds. Portland Oolite, 



Swindon, Wilts. (Page 8S.) 



2, „ gibhosa. Sow. Variety ; see also fig. 4, Plate XVIII. Portland 



Oolite, Tisbury. (Page 84.) 



3, 4, 4, a, b. „ Manseli, Lye. Portland Oolite, Isle of Portland. (Page 86.) 



