Fieri. 



810 



Pterinea demissa. Improperly named Avicula demdssa 

 on page 68 of this Dictionary. (R. P. Whitfield's corrections, 

 Jan., 1889.)— see also, Pal. Ohio, Vol. 2, 1875, page 78, plate 2, 

 1875, page 78, plate 2, fig. l,left valve, slightly restored on the 

 rear wing, not uncommon in the Upper Hudson River beds at 

 Cincinnati, 0., and probably to be found at all outcrops of the 

 formation, as it has been seen in so many distant localities. 



nil, 



pterinea emacerata, quoted by 0. E. Hall, among his col- 

 lections in Ferguson's and Aughwick Valleys, Huntingdon 

 Co., Pa. (MS. Rt. 1875); and by White (T3, 141) as in the 

 133' of Clinton shales, over the ore bed, at Orbisonia. Y a. — 

 Probably Avicula emacerata, Conrad, Jour. Acad. Nat. Sci., 

 Phila., 1842, figured in this Dictionary, p. 68. — V a^ I. 



Pterinea flabellum. {Avicula Habella, Conrad, Jour. A. 



Mtxtx.n^ 



N. S., Phila., Vol. VIII, 1842.) Vanuxem, Geol. N. Y., 1842, 

 page 152, fig. 37, 3. Rogers, Geol. Pa., 1858, page 827, fig, 669 

 Upper Helderberg^ VIII a^ and Hamilton^ VIII c. — In Penna., 

 Huntingdon Co., found by White in Cove Station RR. cut, in 

 bottom beds of Hamilton middle shales. 



See 000, Spec. 803-6,-7,-8 (internal mold of right valve), 

 803-9,-18 (frag.),-19 (impr.),-21 (imp. of frg.),-23 (frag.) all 

 from Saddleback ridge, near Orbisonia; also in Monroe Co., 

 Marshall's creek, Spec. 804-35 (very poor bit),-67 (poor bit), 

 from Hamilton beds ; also west ot Marshall's falls, Spec. 807-2 

 (fragment),-7,-20 (impression), also in Tioga Co., at Law- 

 renceville. Spec. 850-4 (imp.),-10 (poor.) called by Sherwood 

 Chemung leds. If so it ranges from Villa up to VIII g. 



