709 



Pleu. 



Pleurotomaria euomphaloides, Hall. 15th Annual Re- 

 port, 1862, page 46, plate 6, fig. 4. Sur- 

 face concentrically striate, with a band on 

 the periphery ; almost always in casts ; spire 

 lower than in P. sulcomarginatus ; possibly 

 casts belong really to P, rotalia^ but spire 

 C lower, and diameter less. Hamilton strata^ 

 eastern and middle N. Y., VI II c. 

 P. exigua, Winchell; P. filitexta, Hall. (S. A. M.) 



Pleurotomaria galtensis, Billings. Geology of Canada, 

 349 1863, page 343, fig. 349. From the Oalt^ 

 or Ouelph (just above the Niagara) for- 

 mation in Western Canada. F V, 



'W 



P. giflfordi, Worthen ; P. glandula, Shumard ; P. gono- 

 pleura, Winch. & Marcy; P. granulostriata. (S. A. M.) 



Pleurotomaria gracilis is reported by C. E. Hall (T3 p. 

 367) to be found by him occasionally in some of the beds at 

 the top of the Trenton formation, on the Little Juniata, river 

 in Huntingdon Co. He probably meant Murchisonia 

 gracilis, which see. II c, 



Pleurotom.aria grayvillensis, Norwood & Pratten, Jour. 

 Acad. Nat. Sci. |2] Vol. 3,1855. Coal measures. — See above 

 Platystom.a grayvillense. — In Pennsylvania recognized 

 by Stevenson and White in the Ferriferous limestone quarries of 

 Beaver Co., south ban^ of Ohio river, below Raccoon Creek 

 (K, 346; Q, 62); in Lawrence Co. (Q2, 47, 106) ; in Mercer Co. 

 (Q3, 25) ; in Butler Co. (V, 147.)— Also by White in the un- 

 derlying shales, over the Scrubgrass coal, (Q3, 78.) — Also by 

 Stevenson in the Decker'^s creek shale under the Mahoning 

 sandstone at Morgantown, W. Va. (L, 37.) — Also in the Grin- 

 oidal limestone of the Barren measures (Q, 30; L, 36, H45 

 78; K3, 310.)— X///, XIV. 



Pleurotomaria gregaria, Billings. Geology of Canada, 

 29.^ 1863, page 119, fig. 29 ^, J, c. From the 

 Calciferous sandstone^ II a. 



CancA 



