38 
Explanation of Plate I. 
Figs. 1-3. OUhis lamellosa new species. 
“ 1. View of the dorsal valve of holotype, x 3, Ellis bay, zone 9 of Ellis Bay 
formation, holotype in Peabody Museum, Yale University. 
“ 2. Ventral valve of holotype, x 3. 
“ 3. Outline view of holotype, x 3. 
Figs. 4-5. Chonetes primigenius new species. 
4. View of a small slab containing the holotype (middle shell) and two 
paratypes, x 2, Wreck beach, zone 3 of the Gun River formation, 
specimen in Peabody Museum. 
“ 5. View of a specimen from Charleton point, x 2, zone 3 of Charleton for- 
mation, specimen in Peabody Museum. 
Figs. 6-7. Hyattidina charletona new species. 
“ 6. View of dorsal valve of holotype, x 4, Charleton point, zone 3, of 
Charleton formation, specimen in Peabody Museum. 
“ 7. Ventral view of same specimen, x 4. 
Figs. 8-10. Protozeuga anticostiana new species. 
“ 8. Outline view of holotype, x 4, Macasty bay, zone 4 of English Head 
formation, specimen in Peabody Museum. 
“ 9. Dorsal valve of holotype, x 4. 
“ 10. Ventral valve of holotype, x 4. 
Figs. 11—15. Lissatrypa atheroidea new species. 
11. Outline of holotype, x2, Jupiter River cliff, zone 3 of Jupiter River 
formation, specimen m Peabody Museum. 
“ 12. Hinge plate of ventral valve, x 2, same locality and horizon, 
specimen in Peabody Museum, 
“ 13. Dorsal valve of holotype, x 2. 
“ 14. Dorsal aspect of the spirals, x 2, same locality and horizon as 
preceding, specimen in Peabody Museum. 
“ 15. Ventral view of holotype, x 2. 
