NEW YORK STATE MUSEUM 



the suture. It is an expression unusual at this early age though 

 well known in Carbonic shells of similar type and as the de- 



Holopea enjalrani var. corrugata 



parture from H. enjalrani is alone in the clustering of the 

 concentric growth striae into pilae, I should regard the shell a 

 varietal expression of that species. 

 Lower Devonic. Dalhousie, N. B. 



Holopea beushauseni nov. 



acrocheil us ? sp. Beushausen. 

 Preussen etc 1884. pi. i, fig. 7 



Abhandl. z. geol. Specialk. v. 



Shell of considerable size, stoutly subconical with sutures slightly 

 impressed; whorls four to five, depressed convex, overlapped for 

 one fourth to one third of their width ; surface smooth or with 

 fine concentric lines ; angle of spire 40 degrees ; final whorl at its 

 commencement having a diameter equal to the hight of the spire 



Holopeabeushauseni 



above; at the aperture much elongated, explanate or reflected in 

 the lower part. The whorls sometimes show a slightly shouldered 

 appearance and the final whorl may be subangular about its base. 

 This shell occurs in great abundance in the form of distorted casts 

 of the interior and is of the type of structure exhibited by such 

 shells as Conchula stein ingeri Koken [Neues Jahrb. fiir 

 Mineral. Beilageband 6. 1889, pi. 13, fig. 2] and Bucinum 

 arculatum (Schlotheim) MVK [Fossils Older Dep. Rhen. 

 Prov. 1842. pi. 32, fig. i]. With the former it may be directly 



