PETALOBOXTIDiE. 
39 
Janassa gurleiana , E. D. Cope, Amer. Nat. 1881, p. 163, and 
Trans. Amer. Phil. Soc. vol. xvi. (1887), p. 285 ; Stri- 
gilina gurleiana , Proc. Amer. Phil. Soc. vol. xvii. (1878), 
p. 191.—Danville, Illinois. 
Janassa orcliana , E. D. Cope, Amer. Nat. 1881, p. 163, and 
Trans. Amer. Phil. Soc. vol. xvi. (1887), p. 285 (name 
only).—Texas. 
The detached teeth described under the following names also 
appear to be referable to Janassa , as here defined:— 
Climaxodus brevis , J. S. Newberry, Proc. Acad. Nat. Sci. Philad. 
1856, p. 100.—Coal-Measures ; Ohio. 
Peltodus quadratics, 0. St. John & A. H. YYYrthen, Pal. Illinois, 
vol. vi. (1875), p. 410, pi. xiii. figs. 6, 7.—St. Louis Lime¬ 
stone ; Illinois, Missouri. 
Peltodus ( d) plicomphalus , St. John & YVorthen, tom. cit. p. 411, 
pi. xiii. fig. 9.—Chester Limestone ; Illinois. 
Peltodus transversus, St. John & YVorthen, tom. cit. p. 412, pi. xiii. 
fig. 8.—Coal-Measures : Illinois. 
Peltodus unguiformis , Newberry & YVorthen, Pal. Ill. vol. iv. 
(1870), p. 363, pi. ii. fig. 7.—IT. Coal-Measures; Illinois, 
Tanaodus bellicinctus, St. John & YVorthen, tom. cit. p. 376, pi. xi. 
figs. 14-16, 25.—Chester Limestone; Illinois. 
Tanaodus depressus , St. John & VVorthen, tom. cit. p. 378, pi. xi. 
figs. 11-13.—Chester Limestone ; Illinois. 
Tanaodus grossiplicatus, St. John & VVorthen, tom. cit. p. 375, 
pi. xi. fig. 26.—Chester Limestone ; Illinois. 
Tanaodus polymorphic, St. John & YTorthen, tom. cit. p. 380, pi. xi. 
figs. 17-19, 24.—Chester Limestone ; Illinois. 
Tanaodus prcenuntius , St. John & YVorthen, tom. cit. p. 371, pi. xi. 
figs. 6-10.—St, Louis Limestone ; Illinois, Iowa, Missouri. 
Tanaodus pumilus , St. John & YVorthen, tom. cit. p. 369, pi. xi. 
figs. 1-5.—St. Louis Limestone ; Illinois, Iowa. 
Tanaodus sculptus , St. John & YVorthen, tom. cit. p. 373, pi. xi. 
figs. 20-23.—St. Louis Limestone ; Illinois, Iowa,Missouri. 
Tanaodus sublunatus , St. John& YVorthen, tom. cit. p. 368, pi. xi. 
fig. 27.—St. Louis Limestone ; Illinois. 
The genus and species Thoracodus emydinus, Cope (Proc. Acad. 
Philad. 1883, p. 108), is founded upon fossils from the Permian of 
Illinois, evidently corresponding each to half of a bilateral tooth 
having the characters of that of Janassa. Cymatodus oblongus, 
Newberry & YVorthen (Pal. Ill. vol. iv. p. 364, pi. iv. fig. 7), from 
the Coal-Measures of Illinois, also seems to be related to Janassa. 
