AKT. 12 CLASSIFICATION OF CONODONTS ULRICR AND BASSLER 59 



Plate 6 



Specimens here illustrated are from the Rhinestreet shale at Shaleton, 



N. Y., and the illustrations are magnified 15 diameters. 



Page 



Fig. 1. Loncliodina paucidcns, new species 34 



Tooth with the few straggly, slender denticles on a curved 

 bar, characteristic of the species. 



2,3. Loncliodina transversa, new species 34 



Two examples showing range in size but both illustrat- 

 ing the characteristic long, straight, outwardly bowed 

 bar. 



4. Loncliodina alternata, new species 35 



The holotype illustrating alternation of large and small 

 sets of denticles. 

 5-7. Loncliodina sul) symmetrica, new species (see also pi. 5, 



fig. S and pi. 1, fig. 24 34 



Three of the cotypes showing specimens of various sizes. 



S-10. Loncliodina ahnormis, new species 34 



Three teeth with the characteristic short, thick bar sur- 

 mounted by few well-separated denticles. 



11, 12. Bryantodus tijpicus, new species 21 



Examples of different sizes illustrating the broad cusp 

 laterally confluent with the adjacent denticles. 



13. Bryantodus tridentatus, new species 22 



The holotype, consisting of three broad-based, thin-edged 

 denticles. 



14. Bryantodus incquaUs, new species 22 



Tooth showing the unequal development of denticles on 

 the sides of the main cusp. 



15, 16. Bryantodus mnltidens, new species 22 



Two teeth showing opposite sides. 



17,18. Bryantodus crassidcns, new species 23 



Opposite sides of two teeth showing the short, thick 

 denticles. 



19-21. Bryantodus obliquus, new species 23 



Three teeth of different sizes illustrating the anteriority 

 curved denticles. 



22-24. Bryantodus sinuatus, new species 23 



Specimens showing the characteristic sinuate base. 



Plate 7 



The specimens here illustrated are from the Hardin sandstone basal member 

 of the Mississippian-Chattanooga black shale at Mount Pleasant, Tenn. Mag- 

 nification, X 15. 



Paga 



Pig. 1, 2. Ancyrodella malleus, new species 49 



Concave under surface (1) and upper surface (2) of the 

 type specimen. 



3,4. Palmatolepis lobatula, new species 50 



Ui)por surface of the type specimen (3) and under surface 

 of another plate referred to the species. 



