PLATE I. 



Localities from which the specimens figured 



Fig. Names of the shells. page were obtained. 



1. Rostellaria ? gracilenta (nat. 



size) 1 Red Crag, Felixstowe (derived). 



2. Raphiionia suhmarginata (en- 



larged) 5 Red Crag, Felixstowe (derived). 



3. Trophon muricatus, var. exossus 



(enlarged) 3 Red Crag, Felixstowe. 



4. Pleurotoma harpula (enlarged) 5 1 Crag, Boy ton. 



5. — ^r«a72or (enlarged) 4 Red Crag, Walton Naze. 



6. Columhella abbreviata ... 6 Red Crag, Foxhall. 



7. Pleurotoma nebula (enlarged). 4 Red Crag. 



8. — turris (nat. size) . 3 Red Crag, Felixstowe (derived). 



9. Trophon antiquus, var. des- 



pectus (nat. size) ... 2 Red Crag, Sutton. 

 10, a. Columbella erythrostoma ? (nat. 



size) . 6 Red Crag, Butley. 



10. «5. — — .^(nat. 



size) . 6 Red Crag, Butley. 



11. Menestho Suttonemis (en- 



larged) 9 Cor. Crag, Sutton. 



12. Odosiomia Beevei {QnXoxgQdi) . 9 Fluvio-marine Crag, Bramerton (derived?) 



13. Nodostoma ornata -(enlarged) 8 Cor. Crag, Sutton. 



14. — eulimelloides (en- 

 larged) S Cor. Crag, Sutton. 



15. Margarita crassi-striata (en- 



larged) 10 ? Crag, Boy ton. 



16. a. Siliquaria parva (enlarged) . 1 1 "i Fluvio-marine Crag, Bramerton (de- 

 \Q, b. — — (enlarged) . \\ ) rived?) 



17. Pecten disparaiua (nat. size) . 12 Red Crag. 



