﻿PLATE V. 



Fig. 



1, a, b. Trigonia irregularis, Seebach. Specimen of adult growth, Oxford Clay, 



Weymouth. (Page 39.) 



2. „ „ Imperfect specimen with the rows of costae more than 



usually mmierous and irregular. 



4. „ formosa, Lye. Young example, Inferior Oolite, Cold Comfort, near 



Cheltenham. (Page 35.) 



.5. „ „ Young example, Rodborough Hill, near Stroud. 



6. „ „ Specimen of adult growth, Rodborough Hill, near 



Stroud. 



3 and 7. „ striata, Miller. Adult examples, Inferior Oolite, Bradford Abbas, 



Dorset. (Page 36.) 



8. „ „ Young example from the same locahty. 



9, 10. „ tuberculosa. Lye. Inferior Oolite, Leckhampton Hill, near Chelten- 



ham. (Page 33.) The perpendicular continuations 

 downwards of the little tubercles are not sufficiently 

 distinct. 



