Raymond : Gastropoda of the Chazy Formation. 219 



Gyronema historicum (Hudson). 



Gyronema leptonotum Raymond. 



Gyronema microclathratum (Hudson). 



Gyronema rotalineum Raymond. 



Helicoto?na vagrans Raymond (Eccyliopterus vagrans). 



Helicotoma whiteavesiana Raymond. • 



Holopea harpa (Hudson). 



Holopea hudsoni Raymond (Trochonema hudsoni). 



Holopea microclathrata Hudson (Gyronema microclathratum). 



Holopea? plauta Raymond. 



Holopea scrutator Raymond. 



Hormotoma infrequens (Billings). 



Liospira docens (Billings). 



Lophospira aspera (Billings). 



Lophospira billingsi Raymond. 



Lophospira perangulata (Hall). 



Lophospira rectangularis Raymond (Trochonema rectangulare). 



Lophospira rectistriata Raymond. 



Lophospira seelyi Raymond. 



Lophospira subabbreviata (d'Orbigny). Name to be dropped. 



Maclurea atlantica Billings (Maclurites atlanticus). 



Maclurea magna Emmons (Maclurites magnus). 



Maclurea striata Emmons (Raphistoma striatum). 



Maclurites atlanticus Billings. 



Maclurites magnus Lesueur. 



Metoptoma ? dubia Hall (Archinacella deformata). 



Metoptoma eubule Billings (Triblidium eubule). 



Metoptoma montrealensis Billings (Scenella montrealensis). 



Murchisonia abbreviata Hall {Lophospira subabbreviata'). 



Murchisonia asper Billings (Lophospira aspera). 



Murchisonia decurta Hall {Lophospira subabbreviata) . 



Murchisonia ? hermione Billings. Probably not Chazy. 



Murchisonia hyale Billings (Plethospira hyale). 



Murchisoftia infrequens Billings (Hormotoma infrequens). 



Murchisonia perangulata Hall (Lophospira perangulata). 



Murchisonia subabbreviata d'Orbigny {Lophospira subabbreviata) . 



Orbicula ? deformata Hall (Archinacella deformata). 



Oxydiscus catilloides Raymond. 



Palseacmsea? irregularis Raymond. 



