Atry. 



56 



PaLNXMU 



Atrypa increhescens. See Rhynchonella capax. Ill b. 



Atrypa intermedia, Rogers, page 823, fig. 634. See Hall, 



PaLN. Y. 

 Vol. II, 



1852, 

 Clinton 

 forma- 

 tion. Spe- 

 c im e n 8 



collected by I. C. White, near Barre forge, Fa. RR., Hunting- 

 don Co., Pa., from Clinton lower shale. See 000, Claypole's 

 list, 237-4, pill box full. — Specimens in the Cabinet, 00, 

 Pal. Coll. p. 233, spec. 506-5; 506-28; by C. E. HaP, 1875, 2 

 m. S. W. of BelPs Mills, Blair Co., from Cthdon liv:e shale, Va, 



Atrypa lacuncsa {Terehraiula lacunosa). Hall, Plate 

 fig. [27, 3]. Vanuxem, page 117, fig. 25-3, 

 Lower Helderberg formation. It is a some- 

 what rare fossil shell of the Pentamerus lime- 

 stone sub-division of the formation in New 

 York, and was apparently confounded by 

 European geologists with Atrypa wilsoni, also 



S^vXv'//'^^'^^ of ^his sub-formation. Vanuxem. — Lower Hel- 

 "■^s^^^pfc^^ derberg (Lewistown) limestone, VL 



Van. ^^5.^ 



Airypa Imvis, See Merista laevis. VL 



Atrypa laticostata ( Terelratula lat?) Hall, plate fig. [m 



%^^^ ^!^^^ S^^^ VIH^^j^ Vlll ^. 



1, la, lb, Ic, Id.] Chemung formation. VIII g, 



Atrypa laticostata, (variant.) Hall, plate fig. {m, 2], a 

 VUf.^^j^ _..,,,.,,_ variety with six ribs instead of 



three; and possibly a distinct 



species. Chemung. VIII, g. 



PUi^^ Hall. [66] 2. 



Atrypa leiitiformis. See Atrypa reticularis. VIII d. 

 Atrypa limitaris. See Leiorhyncus limitaris. VIII 5. 



