I90 NEW YORK STATE MUSEUM 



Coelidium tenue nov. 



This is an elongate, turriculate and slender shell with sharply 

 keeled whorls margined by a simple slit band to which the surface 

 slopes in an almost direct plane without either convex or concave 

 curvature, the surface of the whorls bearing reflected concentric 

 lines. The species comes very close to Kayser's Murchisonia 

 losseni [Fauna des Hauptquartzites, p. 15, pi. 8, fig. 9] from 

 the Spiriferensandstein of the Hartz and the Cobientzian of the 

 Rhine. While approaching this form most closely it is also allied 

 to the M. a n g u 1 a t a Phillips var. a. MVK [Fossils Older De- 

 posits Rhenish Provinces, pi. 32, fig. 7] from the Stringocephalus' 



Coelidium tenue 



limestone of the Rhine. Attention may also be directed to the 

 shell identified by Yerneuil from the Lower Devonic of Nishnij- 

 Tagilsk in the Urals [Geol. de la Russie, 1845. v - 2 > P- 339' pi- 

 22, fig. 7] under the name M. c i n g u 1 a t a Hisinger. Kayser 

 remarks that this is not Hisinger's species, which is confined to 

 the Swedish Upper Siluric. The forms described by Billings from 

 the Gaspe limestone as M. h e b e and M. e g r e g i a are of the 

 same type but are stouter shells with more convex volutions. 

 The Holopella obsoleta of Sowerby figured by Murchison 

 among the fossils of the Tilestones may be of similar type but it is 

 known in literature only from internal casts which serve but a 

 faulty purpose in the determination of such shells. 



Lower Devonic. Presque Isle stream, Chapman Plantation, Me. 

 Abundant also at Dalhousie, N. B. 



Eotomaria hitchcocki nov. 



Shell with rather low, somewhat concave spiral of four to 

 five whorls, the spire usually much depressed when in the shales. 

 The surface of the whorls is regularly sloping, very slightly con- 

 cave, giving an almost uninterrupted slope to the spire. Periphery 



