278 CALIFORNIA ACADEMY OF SCIENCES. 



ATOPS. 



TRILINEATUS Eiiimous, 1849; Proc. Am. Assoc Adv. Sci., 1st Meeting, 



Phila., 1848, pp. 16, 17. 



Calymene beckii Green, Atops tr'dineatus. (Emm.) Fitch, 1849; Trans. 

 Agric. Soc. New York, vol. 9, p. 865 (not CalymenK beckii Green). 



TRILINEATUS Emmons, 1855; Am. GeoL, vol. 1, pt. 2, p. 115, pi. 1, 



fig. 16. 



Syn., Atops punctatus Emm., 1860; Manual Geo!., p. 88, fig. 71; also 

 p. 280. 



TRiLiXE.iTU.s Barr., 1861; Bi;ll. Soc. Gt'ol. France, 2d series, vol. 18, 



p. 269, pi. 5, fig. 1. 



punctatus Barr., 1861; Bull. Soc. Geol. France, 2d series, vol. 18, p. 



271, pi. 5, fig. 3. 



ConocepJicdites (Atopfi) trilineati'S Ford, 1871; Am. Jour. Sci., oil 

 series, vol. 2, p. 33. 



Conocephalites trilixeatus Ford, 1873; Am. Jonr. Sci., 3d series, vol. 

 6, p. 135. 



Conocephalites (Atop^) trilineatcs Ford, 1879; Am. Jour. Sci., 3d 

 series, vol. 9, p. 205. 



Triarthrus trilixeatus Miller, 1877; Catalogue Am. Pal. Foss., \i. 

 223. 



Conoeoryphe trilixeatus Ford, 1880; Am. Jour. Sci., 3d series, vol. 

 19, p. 152. 



Triarthrus becki Wal., 1879; Trans. Albany Inst., vol. 10, p. 23. 



Ptycopharia trilixeatus Wal., 1886; Bull. U. S. Geol. Survey, No. 

 30, p. 203, pi. 27, fig. 1 a-c. 

 The figures of this species given by Dr. Emmons are all imperfect. 

 Ford's figure given in Bull. U. S. Geol. Survey, No. 30, pi. 27, 

 fig. I a-b, shows a glabella and a pygidium, which is nearly semi- 

 circiilar in form; the axis strong, composed of 7 segments, with 

 a row of obtuse spines along the middle; lateral lobes composed 

 of 5 segments, each with distinct intervening grooves; marginal 

 rim nearly flat, widest towards the front and distinctly and regu- 

 larly notched or denticulated all around. This may prove to be 

 a species of the genus Olenoides. 



Conoeoryphe trilixeatus ^Val., 1887; Am. Jour. Sci., 3d series, vol. 

 34, p. 197, pi. 1, fig. 7 a-b. 



Conoeoryphe trilixeata Wal., 1890; 10th Ee]). U. S. Geol. Survey, 

 p. 647, pi. 94, figs. 5, 5 a-e. Olenellus zone. 



Conoeoryphe (Bailiella) walcotti Matt., 1884; Trans. Koyal Soe. 

 Canada, vol. 1, p. 119, pi. 1, figs. 36, 36 b. At St. John, in Di- 

 vision 1 c. Taconic. 



Conoeoryphe walcotti Wal., 1884; Bull. U. S. Geol. Survey, No. 

 10, p. 30. 



Conoeoryphe walcotti, 1890; Trans. Roy. Soc. Caiiada, vol. 8, p. 134, 

 pi. 11, fig. 7, 7 a-c. Paradoxides zone. 



