EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA IQI 



Holopea beushauseni Clarke 



Plate 23, figures 20-22 



Macrocheilus? sp. Beushausen. Abhandl. z. geol. Specialk. v. Preussen etc. 



1884. pi. 1, fig. 7 

 Holopea beushauseni Clarke. N. Y. State Mus. Bui. 107. 1907. p. 188 



Shell of considerable size, stoutly subcortical with sutures slightly 

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

 to one third of their 'vidth ; surface smooth or with fine concentric lines ; 

 angle of spire 40 degrees ; final whorl at its commencement having a diame- 

 ter equal to the hight of the spire 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 

 Con chul a steiningeri Koken [Neues Jahrb. fur Mineral. Beilage- 

 band 6. 1889. pi. 13, tig. 2] and Bucinum arculatum (Schlotheim) 

 MVK [Fossils Older Dep. Rhen. Prov. 1842. pi. 32, fig. 1]. With the 

 former it may be directly compared. Both of these shells are from the 

 Middle Devonic. Beushausen figures as Macrocheilus ? sp. an internal cast 

 of like aspect and proportions from the Spiriferensandstein of the Oberharz 

 (Bocksberg), identical indeed so far as identity can be indicated by internal 

 casts. Specially noteworthy is the agreement in relative size of the final 

 whorl and the explanate form of the apertural margin. 



Locality. Presque Isle stream. A shell of somewhat similar character 

 but apparently stouter with more convex whorls occurs at Edmunds Hill. 



Platyceras leboutillieri Clarke 



Plate 23, figure x 

 See pt 1, p. 145 



Platycera s leboutillieri Clarke. N. Y. State Mus. Bui. 107. 1907. p. 181 

 Platyceras leboutillieri Clarke. N. Y. State Mus. Mem. 9, pt 1, p. 145, pi. 14, 

 fig. 1-4 



I identify with this species from the Grande Greve limestone at Perce\ 

 the small specimen here figured. 

 Locality. Edmunds Hill. 



Platyceras hebes Clarke 



Plate 22, figures 17-19 

 See p. 68 



Platyceras hebes Clarke. N. Y. State Mus. Bui. 107. 1907. p. 185 



Shell conical, slightly oblique, apex blunt or minute, surface expanding 

 rapidly with a vertical slope on the posterior and a more broadly curved 



