CATALOGUE OF TRILOBITES. 353 



PTYCHOPAKIA. 



Crepicephalui^ (Loganellus) planus Whitf., 1877; Prelim. Kep. Pal. 

 Black Hills, p. 11. Castle Creek, Black Hills, Dakota. Taconic. 

 Crepicephalus planus Whit., 1880; Geol. Black Hills, Dakota, p. 343, 

 pi. 2, tig. 20. 



? PERNASUTUS Wal., 1884; Pal. Eureka Dist., Mon. U. S. Geol. Survey, 



vol. 8, p. 49, pi. 10, figs. 8, 8 a, b. Caiion east side Hamburg 

 Ridge, Nev. Tacouic. 



PERO Wal., 1890; Proc. U. S. Nat. Mus. vol. 13, p. 274, pi. 21, fig. 6. 



Morgan's Creek, Burnet Co., Texas.; Trempleau, Wis. Taconic. 

 Conoceph. perseus Hall, 1863; 16th Eep. New York State Cab. Nat. 

 Hist., p. 153, pi. 7, figs. 17-22; pi. 8, fig. 33. Opposite the mouth 

 of the Chippewa on Mississippi River. 



piocHENSis Wal., 1866; Bull. U. S. Geol. Survey, No. 30, p. 201, pi. 



26, fig. 2, 2 a, b; pi. 28, figs. 1, 1 a-e. Ely Mts. and western slope 

 Highland Range, Nev. Taconic. 



? phospectensis Wal., 1884; Pal. Eureka Dist., Mon. U. S. Geol. 



Survey, vol. 8, p. 46, pi. 9, fig. 20. Prospect Mt. on the east 

 slope of Prospect Peak, Nev. Taconic. 



? PROSPECTENSis Wal., 1886; Bull. U. S. Geol. Survey, No. .30, p. 202, 



pi. 27, fig. 5. 



QUADRANGULARis Whitf. The specific name of Conoceph. quadratun 



being preoccupied. Prof. R. P. Whitfield substitutes that of quad- 

 rangularis for this species. Eau Claire and at Ettrick, Wis. 



Potsdam. 

 Conoceph. 1 quadratus Whitf ., 1880; Ann. Rep. Geol, Survey, Wiscon- 

 sin, 1879, p. 47. 

 ConoccjoA. ? QUADRATUS Whitf., 1882; Geol. Wisconsin, vol. 4, p. 180, 



pi. 1, figs. 15, 16. (See Ptychoparia qnadrangularis Whitf.) 

 Conoceph. quadratus Hartt, 1868; Acadian Geology, p. 654. At Cold- 

 brook, St. John, N. B. 



quadratus Wal., 1884; Bull. U. S. Geol. Survey, No. 10, p. 39, pi. 5, 



fig. 1. 



Conoceph. robbi Hartt, 1868; Acadian Geology, p. 648. Ratcliff's 



Millstream. St. John. 



Syn., Conoceph. formosa (Hartt) Wal.; Bull. U. S. Geol. Survey, No. 



10, p. 36. 



robbi Wal., 1884; Bull. U. S. Geol. Survey, No. 10, p. 36, pi. 6, figs. 



1, 1 a. 



Solonopleura robbi Matt., 1887; Trans. Royal Soc. Canada, vol. 4, p. 

 153, pi. 2, figs. 3 a-1; fig. 4 a-e. 

 ROGERSi Wal., 1884; Bull. U. S. Geol. Survey, No. 10, p. 47^ pi. 7, fig. 



2. Braiutree, Mass. Paradoxides zone. 

 Conoceph. shumardi Hall, 1863; 16th Rep. New York State Cab. Nat. 



Hist., p. 154, pi. 7, figs. 1-2; pi. 3, figs. 19, 32. Kickapoo, Wis. 



Potsdam. 

 23 



