PLATE VII. 



Fig. 

 1. Trigonia Pellati, Mun. Ch. Adult example, Osmington Bay, near Weymouth. 



Kimmeridge Clay. (Page 41.) 



:2. „ „ Another example from the same locality and formation. 



3. „ complanata, Lye. Killoway Rock, Cay ton Bay, near Scarborough. 



(Page 49.) 



4, 5. ,, impressa, Sow. Slate, Stonesfield, Oxfordshire. (Page 46.) 



6. ,,' irregularis, Seeb. Young specimen, Oxford Clay, Weymouth. (Page 39.) 



