scHiTCHEKT] INDEX AND BIBLIOGRAPHY. 457 



Triplecia extans (ICiniiioiis). Trenton (Ord.). 



Atiy2>a oxtiiua Emiiious, Geol. N. Y'. ; Rep. Second l)i.st., 1X42. p. 39r>, liy. G. — 



Hall, Pal. New York, I, 1847, p. 137, pi. 33, lig. 1. 

 'I'riplesia extans, Hall, Ibidem, III, 185i>, p. 523, fif^s. 1-3. 

 Triplecia extans Hall and Clarke, J'al. Now York, VIII, I't. I, 18!I2, p. 270, 



pi. 11 C, i'lgti. 1-7. 

 Loc. W.atcrtown, Lowville, and Mooin ille, New York. 



Triplecia niagaraensis llall and Clarke. Niaj-ara (Sil.). 



Triplecia uiagarensis Hull and Clarke, Pal. New York, YIII, I't. II, 1895, pi. 83, 



figs. 16-20. 

 Lor. Near Milwaukee, ^Yiaeonsin. 



Triplecia nucleus Hall. Trenton (Ord.). 



Atrypa uucleu.s Hall, Pal. New York, I, 1847, p. 138, pi. 33, (ig. 2. 

 Triplesia nucleus Hall, Ibidem, III, 18.59, p. 522. 

 Triplecia nucleus. Hall and Clarke, Pal. New York, VIII, I't. 1, 1892, p. 270, 



pi. lie, iigs. 8, 9. 

 Loc. Middleville, New York. 



Triplecia ortoni Meek. Clinton (Sil.). 



Dicraniscus ortoni Meek, American Jour. Sci., 3d ser., IV, 1872, p. 2S0. 



Triplesia ortoni Meek, Pal. Ohio, I, 1873, p. 178, pi. 15, fig. 1. 



Triplecia ortoni. Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 270; 



pi. lie, figs. 12-20.— Foerste, Geol. Ohio, VII, 1895, p. 585. 

 Loc. Dayton, Ohio; Newson, Tennessee. 



Triplecia (?) radiata ^Aliitfield. Calciferous (Ord.). 



Triplesia radiata Whitlield, Bull. American Mus. Nat. Hist., II, 1889, p. 43, pi. 7, 



Iigs. 5-8. 

 Triplecia radiata, Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 271. 

 Loc. Beekmantown, New Y'ork. 



Triplecia ulrichi Wiuchell and Scliuchert. Lorraine (Ord.). 



Triplecia ulrichi W. and S., Minnesota Geol. Survey, III, 1893, p.409, fig. 34. 

 Loc. "Wykoll" and Spring Valley, Minnesota. 



Triplesia ambigua Hall=Caiiiarella, anibigua. 

 Triplesia caleifera Walcott=Syntropbia calcifera. 

 Triplesia congesta Hall = Hyattella congesta. 

 Triplesia lateralis Wliittield=Syntroi)liia lateralis. 

 Triplesia primordialis Wliittield = Syntropliia priinordialis. 

 Trijdesia putillus Hall=Mimulus waldrouensis. 

 Trijdesia ([iiadricostata HaIl = Hyattella congesta. 



TROPIDOLEPTUS llall. Genotype Stropbomena carinata Conrad. 



Tropidoleptus Hall, Tenth Rep. N. Y. State Cab. Nat. Hist., 18.57, p. 152 (unde- 

 fined); — Twelfth Rep. Ibidem, 1859, p. 31 (undefined); Twentieth Rep. — 

 Ibidem, 1867, pp. 165, 279;— Pal. New York, I\, 1867, p. 404.— Nettelroth, 

 Kentucky Fossil Shells, Mem. Kentucky Geol. Survey, 1889. p. 46. — Hall 

 and Clarke, I'al. New York, VIII, Pt. II, 1893, p. 302;— Thirteenth Ann. Rep. 

 N. Y. State Geologist, 1895, p. 870. 



Tropidoleptus carinatus (Conrad). Marcellus and Hamilton (Dev.). 



Stroplioinena carinata Conrad, Third Ann. Rep. N. Y. Geol. Survey, 1839, p. 64. 

 Lepta-na laticosta (Hall) dc Verneuil, Bull. Soc. Geol. France, 2d ser., IV, 1847, 



p. 703. 

 Tropidoleptus carinatus Hall, Tenth Rep. N. Y. State Cab. Nat. Hist., 1857, p. 



151, figs. 1,2;— Twellth Rep. N. Y. State Cab. Nat. Hist., 1859, p. 31, tiga. 



