63 



Whitpibldella Hyalk, Billings. (Sp.) 



Charionella (?) Hyale, Billings. .1866. Geol. Surv. Can., Pal. Foss., vol. I., p. 166, 



figs. 150, a and b. 

 Charionella Hyale, Nicholson.. . .1875. Rep. Paljeont. Prov. Out., p. 67. 

 Whitfieldella Hyale, YLaXl 1893. Pal. N. York, vol. VIII. , pt. 2, pp. 60 



and 79. ' 



Gait, John (not James) Richardson, 1857, and R. Bell, 1861 ; Hespeler 

 and Elora, T. C. Weston, 1867; Elora, Nicholson and Hall. Apparently 

 abundant at each of these localities. 



Atrypa reticularis, L. 



Anomia reticularis, LinnsBus 1767. Syst. Nat., ed. xii., p. 1152. 



Atrypa reticularis (L.) Hall 1852. Pal. N. York, vol. II., p. 72 (which see 



for a list of synonyms, with references, of this 

 ubiquitous species) pi. 23, figs. 8, a-e. 

 " " " Davidson. .. 1866. Brit. Silur. Foss., pp. 129-30 (which see 



for a still fuller list of synonyms of British 

 and European specimens of this shell) pi. 14, 

 figs. 1 to 22. 



Hespeler, T. C. Weston, 1867 : two specimens. This species is 

 apparently rare in the Guelph formation. 



Atrypa reticularis, var. aspera. 



Terebratvlites asper, Schlotheim 1813. Leonard's Tasohenbuch, p. 74, pi. 



1, fig. 7. 



Atrypa aspera, Dalman 1827. Vet. Akad. Handl., pi. 4, fig. 3. 



Atrypa reticularis, VAT. aspera, l>a.viAson. .l%Qi. Brit. Dev. Brach., p. 57 (which 



see for a list of synonyms of this 

 shell), pi. 10, figs. 5-8. 



Hespeler, T. C. Weston, 1867 ■ one small but very characteristic 

 ventral valve, which is marked by eight nodulose radiating ribs or 

 plications. 



Rhynchonella PISA, Hall & Whitfield. 



Bhynehonella pisa. Hall & Whitfield. .1875. Rep. Geol. Surv. Ohio, vol. II., pt. 2, 



p. 1.35, pi. 7, figs. 18-22. 



Hespeler and Elora, T. C. Weston, 1867 : a single cast of the interior 

 of the shell from each of these localities. These specimens agree very 

 well with the description and figures of B. pisa, but they are too imper- 

 fect to be identified with much certainty. 



Pentamerus oblongus, J. de C. Sowerby. 



Pentamerus laiis, James Sowerby 1813. Min. Con., vol. I., p. 76, pi. 28. 



Pentamervs oblongus, J. de C. Sowerby.. . .1839. Silur. Syst., pi. 19, fig. 10. 

 Pentamerus Icems, Sowerby 1839. lb., pi. 19, fig. 9. 



1 



