BUITALO SOCIETY OF NATURAL SCIENCES 153 



vated and shorter than posterior one; occupying about one- third the 

 total area of the dental element. 



Measurements: mm. 



Length, antero-posteriorly in middle line 112 



Greatest width (estimated) 114 



Length of anterior tritor 40 



Width of anterior tritor 20 



[Akmonion, a little anvil; odous, tooth.] 



It gives us great pleasure to name this species for Dr. John M. 

 Clarke, Director of the State Museum and of the Geological Survey 

 of the State of New York. 



Family ORODONTID^ 



Orodus devonicus, n. sp. 

 (PI. 44, fig. 4) 



E 1903 Type. — ^A tooth, 16.5 mm. broad by lo mm. long (i.e. 

 antero-posterior diameter). 



Formation and Locality. — Conodont bed (Genesee) ; Eighteen Mile 

 Creek, near North Evans, Erie County, New York. Collected by W. 

 L. Bryant. 



Tooth small, its length (antero-posteriorly) about f its width. 

 Crown with three low, obtuse denticles, the middle one twice the size 

 of the outer ones; lateral denticles directed forward and outward. 

 Anterior faces of. all denticles smooth; posterior and lateral faces 

 covered with fine, raised lines which do not reach to the apices. No 

 punctae on denticles. Root of the usual orodont form, shelving back- 

 ward, from underneath the front margin of denticles and terminating 

 posteriorly in a straight edge; thickest underneath posterior face of 

 denticles. 



Remarks. — Teeth of Orodus are common in the Carbonic, and 

 especially abimdant in the Lower Carbonic, but they are exceedingly 

 rare in Devonic formations. In fact there is only a single species 

 known from the Devonic — Orodus elegantulus Newberry — from the 

 Cleveland shale of Ohio, and even this formation is regarded by some 

 authors as of Waverlyan (Lower Carbonic) and not Devonic age. 

 For this reason the present species from the Conodont bed, is of great 



