﻿PLATE XXX. 



Fig. 



I, ] a, 2. Trigonia elongata var. angustata, Lyc. Cornbrash, Scarborough. (Page 



154.) My collection. 



3, 3 a, :3 b, 0. „ „ The typical form. Oxford Clay, Weymouth. (Page 



154.) My collection. 



4, 5. ,, var. lata, Lyc. Cornbrash, Scarborough. Also South 



Lincolnshire. (Page 154.) My collection. 



