58 PROCEEDINGS OF THE NATIONAL MUSEUM vol. C8 



I'ago 



Fig. 25-27. Bryantodus normalis, new species 24 



Three teeth showing diCferent aspects of tlie species. 



28. Bryantodus coale-scejis, new species 25 



Tlie type specimens showing tlie merging of four or five 

 denticles adjacent to the main cusp. 



Plate 5 



Specimens here illustrated are from the Rhinestreet shale at Shaletou, N. Y., 

 and the illustrations are magnified 15 diameters. 



Page 

 Fig. 1,2. Lonchodina typicalis, new species 31 



(1) An imperfect large example. 



(2) A perfect smaller specimen. 



3. Lonchodina sttbanr/ulata, new species 32 



The holotype showing the straight, backward bent main cusp. 



4, 5. Lonchodina subrccta, new species 33 



Two teeth exhibting the similarity in size of the main cusp 

 and several of the denticles. 



6, 7. Lonchodina perlonga, new species 32 



Teeth with long, slender, slightly curved denticles, character- 

 izing the species. 

 8. Lonchodina suhsymmetrica, new species (see also pi. 6, figs. 



5-7, and pi. 1, fig. 24) 34 



Tooth similar to that in L. perlonga, but denticles and main 

 cusp are shorter. 



9, 10. Lonchodina? projccta, new species 35 



Two teeth, one imperfect, but both showing the short pos- 

 terior end. 



11. Lonchodina delicatula, new species 33 



The holotype of the species, easily recognized by the widely 

 separated denticles. 



12. Lonchodina separata, new species 31 



Type, differing from L. delicatula in shorter tooth with fewer 

 denticles. 



13,14. Lonchodina rectidens, new species 31 



Two teeth upon which the species is based, illustrating the 

 four large mediiin denticles. 



15. Lonchodina arcuata, new .species 32 



The holotype of this strongly curved species. 



Hi, 17. Tjoncliodina prona, new species 36 



Views of two specimens illustrating opposite sides. 



18. Lonchodina hilateralis, new species 32 



View of the holotype showing the two large denticles. 



19. Lonchodina pcrarcuata, new species 33 



The type specimen illustrating the horseshoe-shnped bar. 



20. Lonchodina increbescens, new species (see also pi. 3, figs. 



15, IG) 35 



A specimen preserving the anterior part showing resemblance 

 to Euprioniodina. 



