814 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Modiolopsis concinna Savage. 



Modiolopsis concinna Savage, Bull. Geol. Surv. Illinois, 23, 1913, p. 54, pi. 2, 



fig. 2. 

 Upper Medinan (Girardeau): Near Thebes, Illinois. 



Modiolopsis(?) consimilis Ulrich. 



Modiolopsis(?) consimilis Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 505, pi. 42, 



figs. 17, 18. 



Stones River (Murfreesboro) : Murfreesboro, Tennessee. 

 Holotype.C&t. No. 46247, U.S.N.M. 



Modiolopsis contigua Sardeson. 



Modiolopsis contigua Sardeson, Bull. Minnesota Acad. Nat. Sci., 4, 1896, p. 72, 



pi. 2, fig. 8. 

 St. Peter: South St. Paul, Minnesota. 



MODIOLOPSIS CORRUGATA Miller and Faber. See Whiteavesia corrugata. 



Modiolopsis cuneiformis James. Not recognized. 



Modiolopsis cuneiformis James, Paleontologist, No. 3, 1879, p. 23. 

 Maysville or Richmond: Near Lebanon, Ohio. 



Modiolopsis curta Hall. Not recognized. 



Modiolopsis curta Hall, Pal. New York, 1, 1847, p. 297, pi. 81, fig. 4; pi. 82, figs. 



2a-d. Nicholson, Rep. Pal. Prov. Ontario, pt. 2, 1875, p. 35, fig. lla. 

 Lyonsia curta Emmons, Amer. Geology, 1, pt. 2, 1855, p. 171. 

 Cincinnatian (Pulaski): Loraine, Rodman, Rome, etc., New York. 

 Observation. Hall's figures, plate 81, fig. 4, and plate 82, fig. 2t, are apparently 

 of Ischyrodonta unionoides; plate 82, fig. 2a, is of Pterinea demissa and plate 

 82, fig. 2c, is of a small Cyrtodonta from Mineral Point, Wisconsin. 



Modiolopsis depressa Weller. 



Modiolopsis depressa Weller, Geol. Surv. New Jersey, Pal., 3, 1903, p. 171, pi. 11, 



fig. 8. 

 Trenton: Jacksonburg, New Jersey. 



Modiolopsis dictaeus Hall. 



Modiolopsis dictseus Hall, 20th Rep. New York State Cab. Hist., 1868, p. 338, pi. 



14 (5), fig. 7; rev. ed., 1870, p. 385, pi. 14, fig. 7. 

 Niagaran (Racine): Racine, Wisconsin; Bridgeport, Illinois. 



MODIOLOPSIS DUBIA Hall. See Goniophora dubia. 



Modiolopsis dychii Miller. 



Modiolopsis dychii Miller, 18th Ann. Rep. Indiana Dep. Geol. Nat. Res., 1894, p. 



331, pi. 8, figs. 4, 5 (adv. sheets, 1892). 

 Richmond: Lebanon, Ohio. 

 Observation. Not recognizable. Probably based on a crushed specimen. 



Modiolopsis excellons Ulrich. 



Modiolopsis excellens Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 511, pi. 36, figs. 



13 and 14. 

 Richmond (Maquoketa): Spring Valley and Granger, Minnesota. 



Modiolopsis exilis Billings. 



Modiolopeis exilis Billings, Pal. Foss., Geol. Surv. Canada, 2, pt. I, 1874, p. 132, 



pi. 8, fig. 5, 5a. Ami, Proc. Trans. Nova Scotia Inst. Sci., 8, 1895, p. 414 



(loc. occ.). 

 Silurian : Arisaig, Nova Scotia. 



