CATALOGUE OF TRILOBITES. 339 



PKOETUS. 



Trigonaspis and CylindraspisSsind.; Verst. d. Rheiu, Scht.-Syst., 

 p. 30, pi. 3, 1850. 



DECHENELLA Kays., 1880; Zeitschr.Deutsch.Geol.Gesell., Berlin, 

 1880, p. 703. For such species as Proetus verticallis and 

 P. haldemani. The glabella has 4 pair of furrows, 10 thorax 

 segments. I would prefer taking the older name of Monia, 

 for this subgenus. 



CELMUS Ang., 1852; Palfeont. Scand., p. 23. Two pair of gla- 

 bella furrows, 12 segments to the thorax. 



ALARICUS Bill., 1860; Canadian Naturalist, vol. 5, p. 68, fig. 12. Anti- 



costi. Hudson. 



ALARICUS Bill., 1863; Geol. Canada, p. 219, fig. 230. 



ANGUSTIFROXS Hall, 1861; Des. New Species Foss., p. 70. Schoharie, 



N. Y. Schoharie Grit. 

 ANGUSTIFROXS Hall, 1862; 15th Rep. New York State Cab. Nat. Hist., 



p. 98. 



ANGUSTIFRONS Hall, 18/6; Illus. Dev. Foss. Crust., pi. 20, figs. 1, 4, 7. 



ANGUSTIFRONS Hall, 1888; Pal. New York, vol. 7, p. 91, pi. 20, figs. 1-5; 



pi. 22, figs. 1-3. 

 Phcetonides ARENICOLUS Hall, 1888; Pal. New York, vol. 7, p. 134, 



pi. 25, figs. 12, 13. Schoharie, N. Y. Upper Helderberg. 



auriculatus. (See Proetus missouriensis Shum.) 



CANALICULATUS Hall, 1861; Des. New Species Foss., p. 73. Falls of 



the Ohio. Upper Helderberg. 



CANALICULATCS Hall, 1862; 15th Rep. New York State Cab. Nat. Hist., 



p. 101. 



CANALICDLATUS Hall, 1876; Illus. Dev. Foss. Crust., pi. 20, figs. 10, 11. 

 CANALICULATUS Hall, 1888; Pal. New York, vol. 7, p. 107, pi. 20, figs. 



10, 11; pi. 23, figs. 10, 11. 



CLARUS Hall, 1861; Des. New Species Foss, p. 71. Stafford, Batavia 



and elsewhere in Genessee Co., N. Y. Upper Helderberg. 



- CLARUS Hall, 1862; 15th Rep. New York State Mus. Nat. Hist., p. 99. 



- CLARUS Hall, 1876; Illus. Dev. Foss. Crust., pi. 20, figs. 12-14. 



- CLARUS Hall, 1888; Pal. New York, vol. 7, p. 104, pi. 20, figs. 12-14; 



pi. 22, figs. 28-30. 



CONRADI HALL, 1861; Des. New Species Foss., p. 69. Schoharie and 



Helderberg Mts. , N. Y. Schoharie. 



- CONRADI Hall, 1862; 15th Rep. New York State Cab. Nat. Hist., p. 97. 



CONRADI Hall, 1876; Illus. Dev. Foss. Crust., pi. 21, fig. 6 (not figs. 



5, 8, 9, P. crassimarginatus)', pi. 21, figs. 27, 28. 

 - CONRADI Hall, 1876; Illus. Dev. Foss. Crust., pi. 20, figs. 5, 8, 9. 



- CONRADI Hall, 1888; Pal. New York, vol. 7, p. 89, pi. 20, fig. 9; pi. 21, 



tigs. 27, 28; pi. 12, fig. 4. 



Asaphus CORYCCEUS Con., 1842; Jour. Acad. Nat. Sci. Phila., vol. 8, p. 

 277, pi. 16, fig. 15. Lockport, N. Y, Niagara. 



