1008 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



PLEURONOTUS Hall. Genotype: Euomphalus decewi Billings. 



Pleuronotus Hall, Nat. Hist. New York, Pal., 5, pt. 2, 1879, p. 138. Koken, 



Neuea Jahrb. Min. Geol. Pal., 6, Beilage-Band, 1889, p. 408. Miller, N. A. 



Geol. Pal., 1889, p. 419. Koken, Die Leitfossilien, Leipzig, 1896, p. 105, figs. 



87,4-6. 



Pleuronotus subangulatus Grabau. 



Pleuronotus subangulata Grabau, Michigan Geol. Surv., Geol. Ser. 1, 1909, p. 185. 

 Upper Monroan (Lucas): Salt shaft, Detroit, Michigan. 



PLEURORHYNCHUS ANTIQUA Owen. See Conocardium antiquum. 



PLEUROTOM ARIA Defrance. Genotype: P. anglica Defrance. 



Pleurotomaria Defrance, Tableau Corps Organises Fossiles, 1824, p. 114; Diet. 



Sci. Nat., 41, p. 381. 



Observation. Many references to this genus have been made by American 

 authors, but it seems useless to cite them since none of them probably refers to 

 Pleurotomaria in a strict sense. See Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 

 1897, p. 960, for a discussion of this subject. 



PLEUROTOMARIA of authors. See Clathrospira Ulrich and Scofield, Cyclonema Hall, 

 Eotomaria Ulrich and Scofield, Lophospira Whitfield, Plethospira Ulrich, 

 Raphistoma Hall, Raphistomina Ulrich and Scofield, and Seelya Ulrich. . 



Pleurotomaria abrupta Billings. 



Pleurotomaria abrupta Billings, Canadian Nat. Geol., 4, 1859, p. 354. 

 Chazyan (Mingan): Mingan Islands, Canada. 



Pleurotomaria agarista Billings. 



Pleurotomaria Agarista Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 230. 

 Canadian (Quebec H): Table Head, Newfoundland. 



Pleurotomaria agave Billings. 



Pleurotomaria Agave Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 170, text 



fig. 153. 

 Trenton: Naquareau River, above Red River, Canada. 



Pleurotomaria aiens Sardeson. 



Pleurotomaria aiens Sardeson, Bull. Minnesota Acad. Nat. Sci., 4, 1896, p. 76, 



pi. 3, figs. 16, 17. 

 St. Peter: Highland Park and South St. Paul, Minnesota. 



Pleurotomaria (Trochonema?) ambigua (Hall). 



Pleurotomaria ambigua Hall, Pal. New York, 1, 1847, p. 176, pi. 38, figs. 3a-b. 



Emmons, Amer. Geology, 1, pt. 2, 1855, jj. 161. 

 Trenton: Adams, Jefferson County, New York. 



PLEUROTOMARIA AMERICANA Billings. See Liospira americana. 

 PLEUROTOMARIA AMPHITRITE Billings. See Euconia amphitrite. 



Pleurotomaria angulata Conrad. Not recognized. 



Pleurotomaria angulata Conrad (not Sowerby), Proc. Acad. Nat. Sci. Philadelphia, 



1843, p. 330. Owen, Geol. Expl. Iowa, Wisconsin, Illinois, 2d ed., 1844, p. 



86, pi. 17, fig. 5. 

 Trenton: Lewis County, New York; Iowa; Wisconsin. 



