206 ROYAL SOCIETY OF CANADA 



Donald, J. T. Canadian Naturalist, 1891, n.s. IX, pp. 302-304. A 



list of 35 species includes names of Niagara, Helderberg and 



Oriskany species. 

 Beeks, Wm. Can. Record Sci., 1890, IV, pp. 104-9. 44 species listed. 

 Ami, H. M. Ann. Kept. Geol. Surv. Can., 1896, n.s. YII, pp. 154J-156J. 



45 species are listed. 

 Williams, H. S. Bull. U.S.G.S., 165, 1900, pp. 37-38, a reprint of 



Deck's and Ami's lists without change. 

 SCHUCHERT, Chas. Am. Geologist, 1901, Vol. XXVII, pp. 245-353. 



Criticism of previous identifications. 

 In the last paper mentioned the following list of species is given and 

 the author's conclusion is expressed that there are two distinct faunas 

 represented : one equivalent to Helderbergian, the other of Middle De- 

 von! c age. 



St. Helen's Island Fauna. 



(According to Chas. Schuchert, Am. Geologist, 1901, Vol. XIVII, 



pp. 245-253.) 



Helderbergian Fauna. 



1. " Heliolites " Decks = ? Striatopora. 



2. " Orthis hipparionyx," Donald and Deeks. 



= Spirifer near S. granulosus Con. 

 and S. ourytienes, Owen. 



3. Rhipidomella cf. musculosa. Hall? 



4. Rhipidomella cf. musculosa. Hall ? 



5. " Strophomena profunda," Donald, not present in tlie Redpath 



Collection. 

 " Strophodonta profunda," Deeks. 



6. Stropheodonta varistriata var. arata. Hall. 



7. Strophonella punctilifera, (Conrad). 



8. Spirifer concinnus. Hall. 



9. Spirifer Murchisoni Castelnau, early variety. 



10. " Spirifer allied to arenosus," Donald, Deeks and Ami=not areno- 



sus, cf. concinnus. 



11. '"' Stricklandinia gaspensis," Donald and Deeks. 



^cf. Camarotœchia, ( Plethorhyncha) . 

 pleiopleura. Hall. 



12. " Pentamevus vorneuili." Donald and Deeks. 



= ? Spirifer concinnus. 



13. Gypidula pseudogaleata (Hall) ? 



14. Eens'selaeria œquiradiata. Hall. 



