no. 1646. REVISION OF BEYRIGHIIBM ULRICH AND BASSLER. 301 



Genotype. — Klmdenia wilckensiana (Beyrichia wilckensiana 



Jones ) . 



LIST OF SPECIES 1IAYI.\«, THE CHARACTERS OF KLCEDENIA AS 



ABOVE DEFINED. 



Klcedenia apiculatq .Jones. 



Klcedenia barretti (Beyrichia barretti Weller). 



Kin <l( iii<i centricomis, new species/' 



Klcedenia concinna (Beyrichia concinna Jones and Holl). 



Klcedenia fimbriata," new species. 1 ' 



Klcedenia granvlata a (Beyrichia granulata Hall). 



Klcedenia initial!*" (Beyrichia initialis Ulrich). 



Klcedenia intermedia (Beyrichia intermedia Jones and Holl). 



Klcedenia intermedia marginata Jones and Holl. 



Klcedenia jerseyensis (Beyrichia jerseyensis Weller). 



Klcedenia kvmmeli (Beyrichia kummeli Weller). 



Klcedenia manliensis a (Beyrichia manliensis Weller). 



Klcedenia manliensis deckerensis" (Beyrichia deckerensis Weller). 



Klcedenia marginalise new species.* 



Klcedenia montaguensis a (Beyrichia montaguensis Weller). 



Klcedenia nearpassi (Beyrichia nearpassi Weller). 



Klcedenia oculina (Beyrichia oculina Hall). 



Klcedenia parasitica (Beyrichia parasitica Hall). 



Klcedenia pramuntia, new species.^ 



Kicedenia punctillosa, a new species/ 



H American species. 



& The unusual length of the valve, spine-like central node, and coarse pitting 

 are features which will cause the easy identification and differentiation of this 

 species from others of the genus. See Plate XXXYIII, tig. 23. 



Formation ami locality. — Coeymans limestone, Cumberland, Maryland. 



Holotype.— Cat. No. 53305, U.S.N.M. 



c This tine species will be recognized at once by its spinous margin. This 

 spiny frill, together with the reticular surface ornament and geueral neatness 

 of form, impart a striking elegance to the shell. See Plate XXXVIII, fig. 22. 



Formation ami locality. — Coeymans limestone, Herkimer County, New York. 



Holotype.— Cat. No. 53306, U.S.N.M. 



''This species is similar to Klcedenia manliensis (Weller), but has a wider 

 margin, is more elongate, and its sulci are mnch shallower. The surface is 

 smooth, without ornament. See Plate XXXVIII, fig. 16. 



Formation a ail locality. — Helderbergian, Dalhousie, New Brunswick. 



Holotype.— Cat. No. 53937, U.S.N.M. 



'The distinctive features of this species are the unusual narrowness of the 

 posterior lobe and the sharp impression yet unusual brevity of the sulci. The 

 smooth surface and obscurely defined marginal rim will likewise assist in the 

 discrimination of the species. See Plate XXXYIII, rig. 15. 



Formation anil locality. — Ordovician (local bed in upper part of Hermitage 

 formation). Four miles south of Carthage, Tennessee. 



Holotype— Cat. No. 4104:;, U.S.N.M. 



''This new species is similar to Klcedenia nearpassi i Weller) and A', bar- 

 retti (Weller) in outline, but its dorsal angle is more nearly rectangular and 

 the marginal rim narrower. The surface is finely punctate. See Plate 

 XXXYIII, fig. 17. 



Formation and locality. — Helderbergian, Dalhousie, Xew Brunswick. 



Holotype.— Cat. No. 53938, U.S.N.M. 



