329 



Conchidium.(?)ocride'italis,B.a,\la,ndCl&Tke.lS9i. Pal. N. York, vol. VIII, pt. II, 



pi. 67, figs. 1-5. 

 Conchidium occidentale, Sehuchert 1897. Synops. Amer. Poss. Braoh., p. 187. 



Clorinda ventricosa (Hall). 



Pentamerus ( Barrandella) ventncosus. Hall. 1893; and, this volume, pt. II (1895) with 



the synonymy and references there given. 



Barrandella ventricosa, RsM a,nd GlaTke 1891. Pal. N. York, vol. VIII, pt. II, 



pi. 71, figs. 4-10 ; and pi. 84, fig. 46. 



Clorinda ventricosa, Sehuchert 1897. Synops. Amer. Foss. Brach., p. 185, 



This species has been recorded by the late Professor H. A. Nicholson 

 (1875, Rep. Palseont. Prov. Ontario, p. 67) as having been found in the 

 Guelph formation at Hespeler aad Elora, but the writer has never seen 

 an authentic Canadian specimen of it. 



RuYNCHONELLA PISA, Hall and Whitfield. 

 Atrypa eeticdlaris (L). 

 Atrypa aspera (Schlotheim.) 



Spiriper radiatus (Sowerby). 

 If Sehuchert is correct in stating, on page 402 of his " Synopsis ", that 

 the S. plicatella of authors = S. radiatus, the specimens referred to as 

 S. plicatella, on page 62 of the second part of this volume, are probably 

 S. radiatus. 



Spirifer crispus (Hisinger). 

 Whitfieldella Hyale (Billings). 



MOLLUSCA. 

 Pelecypoda. 

 Megalomus Canadensis, Hall. 

 Megalomus compressus, Nicholson and Hinde. 

 Pteeinea. Species undeterminable. 

 Amphic^elia neglecta (McChesney). 

 CoNOCARDiUM. Specics undeterminable. 

 GoNioPHORA CRASSA, Whiteaves. 

 Ilionia Canadensis, Billings. 



Ilionia (?) costulata, Whiteaves. 



Probably a new generic type, but the few specimens collected shew no 

 indications of the hinge line or muscular impressions. 



