835 



Ptycho. 



10, U. S, G. S. page 41, plate 6, fig. 6) 6b^ enlarged twice ^tjpesj 

 6^, enlarged twice^ type of Hart's neglectus. Lower Cambrian 

 {Saint John) formation, N. Brunswick. Z. G. 



Ptychoparia teucer. ( Conocephlites teucer, Billings, 1861, 

 - Geol. Vt. II, 951, fig. 356; Pal. Foss. I, p. 

 '^•26 13^ fig le; Geol. Can. 286, fig. 295.) Wal- 

 cott, Bulletin No. 30, page 197, plate 26, fig. 

 3, from *'Red sandrock" east of Highgate 

 Springs, Vt. Lower Cambrian {Georgian) 

 formation ; Vt. ; also below Quebec. Z. C. 



Ptychoparia trilineata. See Conocoryphe trilineata, Wal- 

 cott. This is not Triarthrus or Calymene beckii^ as asserted 

 on page 108 of this Dictionary ; for Walcott has a hundred 

 specimens of it obtained by him on the typical field of Eastern 

 New York; it is a blind triolobite, and belongs to the Olenel- 

 lus {Georgian) Lower Cambrian zone^ beneath the Paradoxi- 

 des zone ; whereas Cal. or Triarthrus bechii is a Hudson River 

 trilobite. (MS. Letter and Paper before Bost. Nat. Hist. Soc. 

 Dec. 21,1888.) 



Ptycoparia trilineata. {Atops trilineatus Emmons, 1844, 



Tac. Syst. p. 20, 

 fig. 1, plate 2, 

 fig. 3 ; Agric. Rt. 

 N. Y. I, p. 64, 

 fig. 8, plate 14, 

 fig.3,1849,Proc. 

 AAAS. I, p. 16; 

 1855, Am. Geol- 

 ogy, I, ii, 115, 

 plate 1, fig. 16. 

 See also Halde- 

 man,1848,Amer. 

 J. S. [2] Vol. 5, 

 p. 107; alsoBar- 

 rande, 18 61, 

 Bull. S. G. Paris 

 [2] XVIII, 269, pi. 5, fig. 1. Trans. Albany Institute, Vol. X, 

 page 23. Atops punctatus^ ^rnmon^- M^din. Geol. 1859, p. 88, 

 fig. 71. Barrande, 1861, Bull. S. G. France, Vol. 18, p. 271, 





