629 



Phao. 



given on a previous page (p. 187) is 

 J from Geol. Canada, 1863, page 187, fig. 



Phacops bufo. {Calymene lufo.) Hall, Geol. Fourth 

 Dist., page2200, fig. 80,6. Eogers, Geol. Pa., 

 page 828, no figure. Hamilton formation. 

 (Green's Monograph of Trilobites, 1832.) See 

 Hall's Pal. N. Y. Vol. VII, 1888, plate ^.— In 

 Monroe Co., Pa., near Stroudsburg, it occurs 

 in Corniferous limestone^ G6, p. 121. At Mar- 

 shall's Falls, collected by H. D. Rogers, and 

 0. E. Hall. Marcellus? In Centre Co. by 

 S^ Ewing from Marcellus, T4, 33.— Fa, 5. 



Phacops callicephalus. Hall. See Dalmanites callieeph- 



U c ^...rrr^rrmrty^^ iS'^ alus. The figure here added to those 



I ^ 



t^^y 1S4, a perfect specimen of thi^ beauti- 

 Gcoty^^^^^^^dk^ Can fultrilobite of Trenton age, lie, 



Phacops crassimarginatus. See Proetus crassimargin- 

 atus. VIII c, 



Phacops hudsonieus, Hall. Pal. N. Y. Vol. 3, 1859, page 



Vl. .^ ^ ..^^.^.X^ ^^^' plate 73, 



figs. 26, the head 

 of the tribolite; 

 27, seen in pro 

 Rle; 28^ enlarged 



eyes extend backward to the line of the first annular furrow, 

 having an elevation of four ranges of lenses. Species founded 

 on a single head (the test being removed from the glabella) 

 found at Becraft's mountain, near Hudson N. Y, in the com- 

 pact beds of shaly limestone of the Lower Helderierg, VI 



Phacops limulurus. See Dalmanites limulurus. Eogers, 

 Geol. Pa. p. 823. No figure. Vh 



Phacops logani. Hall. Pal. N. Y. Vol. 3, 1859, page 353, 

 plate 73, fig. 15, head compressed and eyes a little distorted; 

 16, a rolled up individual ; 17, larger head, transverse furrows 

 eyes in good form ; 18, large head, with few pustules ; 19, front 

 view of 17 ; 21, lower side of another head, cremulations along 

 the side furrow; 22, specimen which has had the grained sur- 



