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EXPLANATION OF PLATE XXL 
Fig. 1 . Siphonotreta obovala, sp. nov., Pedicle valve, x 4 (Spec. 3). 
Fig. 2. S. discoidalis, sp. nov., Pedicle valve from a cast of an impression, 
with trace of the median canal. Fig. 2a. Elevation of pedicle 
valve, x 4 (Spec. 22). 
Fig. 3. Chonetes concinna , sp. nov. Dorsal valve, and denticulate cardinal 
area, x 4 (Spec. 25). 
Fig. 4. Orthis leviensis (?), Eth. hi. Ventral valve. Taken from a wax 
impression, x 2 (Spec. 23). 
Fig. 5. Strophomena flabelloides , sp. nov. Ventral valve inner surface, 
x 4 (Spec. 9)* 
Fig. 6. Orthis ( Hebertella) vespertilioides , sp. nov. Ventral valve, x 3 
(Spec. 21). Taken from a wax impression. 
Fig. 7. Orthis (Hebertella) raristriata , sp. nov. Dorsal aspect. Fig. 7a. 
Elevation of dorsal valve and cardinal area, x 3 (Spec. 28). 
Fig. 8. Orthis tenera , sp. nov. Dorsal valve. Fig. 8a. Elevation of dorsal 
valve. x (Spec. 27). 
Fig. 9. Orthis (Bilobites) divaricata , sp. nov. Ventral valve, x 4 (Spec. 
37). 
Fig. 10. Rhynchonella (Carnarotoechia ?), sp. Sinus area of ventral valve, 
x 2 (Spec. 29). 
Fig. 11. Modiolopsis (?) knowsleyensis, sp. nov. Interior of right (?) valve 
x 5 (Spec. 15). 
Fig. 12. Modiolopsis (?) knowsleyensis , sp. nov. Part of valve interim 
showing striated muscular impression, x 10. 
