631 Phac. 



Phacops rana. Hall. ( Calymene huio. var. rana^ Green.) 



Pal. N. Y. Vol. 7, 1888, plate 7, many 

 /2, fine figures. — iSth Annual Report, N. Y. 

 1862, page 93, plate 10, fig. 12. Green's 

 original specimen of 0. hufo was 4^ inches 

 long by nearly 2 broad. In New York 



. .. — ^, Hall never saw this trilobite entire more 



than 2^ inches long; some separated 

 heads 1 J inch, which (X3) would make the largest animal 3| 

 inches ; proportions quite different from (7. hufo^ and specific- 

 ally distinct from P. rana, both in TJ. Held, and Ham. rocks. 

 Green's C. hufo^ var. rana^ Irom Hamilton shales of Ontario 

 Co. N. Y. is common, and occurs also in TJ, Held, strata. 

 Abundant; size half inch to nearly 3 inches; heads and tails 

 indicate that individuals reached 3| inches. More like P, fe- 

 cundus^ Barrande, than any other. Several varieties could be 

 established. U. Helderherg limestone,, throughout N. Y. ; Ham- 

 ilton everywhere. VIII a, c — In Pennsylvania found by I. 

 ij. White at Oattawissa, and near Northumberland (G7, pages 

 289, 339) in what would be the Tully limestone,, if it did not 

 contain exclusively the common Hamilton iorms, (Olaypole.) 

 Also, along Fishing Creek, Hemlock township, Columbia Co. 

 it occurs in a richly fossiliferous bed 100' below the top of Ham- 

 ilton formation (here unaccountably thin. G7, 76, 229). See 

 Spec. 12,152 and 12,185 from Bloomsburg. — In Perry Co., 

 Smith's quarry, Spring township. Spec. 11,957, base of Hamil- 

 ton; Mt. Pisgah, 12,583; Centre mills, 12,815; both Marcellus 

 ^^Aer^beds; Barnett's mill, 11,673 (nineteen examples) ; Drum- 

 gold's tannery 12,415 (four); Brickfield, 12,486 (four), all 

 irom Hamilton upper shale \ Honzell's narrows, 12,459, Ham- 

 ilton sandstone, — In Huntingdon . Co. at Cove station, and 

 Weaver's run section, (T3, 105,115,156,) uwdier Mar cellusilaclc 

 shale, in Maroellus {Corniferous? limestone ; also at Hunting- 

 don (Spec. 12,786, two) and at Rough and Ready, in Hamilton 

 upper shales,, (T3, 109. 110:) also Crooked Creek crossing, 

 Walker township, cliff of Hamilton upper sandstone, (T3, 212.) 

 — Specimens in the cabinet, 801-24 (eleven in all) from Mar- 

 shall's Falls; 804-78, 804-79 (six heads), 804-80 (nine bodies), 

 804-84 (ahead), 804-98, all in Fellows and Genth's collections 

 13 



