.~>S NEW YORK STATE MUSEUM 



characters and at times produces a resemblance to the allied shell, 

 Dalm. subcarinata. Satisfactory evidence of the presence of the 

 latter, is however, still wanting. Both are characteristic brachiopods 

 of the New Scotland beds. 



Rhipidomella oblata Hall 



Plate 8, flg. 14, 15 



1857. Orthis oblata Hall, Paleontology of New York. 3:162, pi. 10 

 1892. Orthis ef. oblata Clarke, op. cit. p. 413 



This Helderbergian species is represented by specimens of rather 

 small size and of not very frequent occurrence. 



Crania pulchella Hall and Clarke 



Plate 8, flg. 16-18 



1892. Crania pulchella Hall and Clarke, Paleontology of New York. 

 v. 8, pt 1, p. 180, pi. 4, fig. 3 



1892. Crania sp. n., Clarke, op. cit. p. 413 



The specimens of this species from Becraft mountain are frequently 

 of large size and have the radial plications very sharply developed. 

 These are more numerous than in the typical specimens of the species, 

 but, as they rapidly increase with additions to the diameter of the 

 shell, there is no reason for not regarding both forms as of the same 

 specific type. 



The original of Cr. pulchella is from the New Scotland 

 limestone, near Clarksville N. Y. 



Crania cf. bella Billings 



Plate 8, flg. 19, 20 



1874. Crania bella Billings, Geol. sur. Canada ; Paleozoic fossils. v. 2, 

 pt 1, p. 15, tig. 5 



1892. Crania ap. n. Clarke, op. cit. p. 413 



This is a generally small shell with smooth surface, upper valve 

 more or less convex, generally concave on the posterior slope, with 

 apex directed slightly backward; sometimes with the posterior margin 

 transverse. It approaches very closely to the species cited, from the 



